CIS 4500 Test 1 | Chapters 1-4

A rack's height is measured in rack units (Us). How tall is a single rack unit? a) 1.25 inches tall b) 2 inches tall c) 1.75 inches tall d) 1.5 inches tall

1.75 inches tall A single rack unit (1U) is 1.75 inches tall and represents one slot in the rack.

You've recently installed a new Windows server. To ensure system time accuracy, you've loaded an application that synchronizes the hardware clock on the server with an external time source on the internet. Now you must configure your network firewall to allow time synchronization traffic through. Which of the following ports are you MOST LIKELY to open on the firewall? a) 123 b) 110 c) 119 d) 80

123 TCP/IP port 123 is assigned to Network Time Protocol (NTP). NTP is used to communicate time synchronization information between systems on a network. HyperText Transfer Protocol (HTTP) uses TCP/IP port 80. HTTP is the protocol used to send requests to a web server and retrieve web pages from the web server. TCP/IP port 119 is used by the Network News Transfer Protocol (NNTP). NNTP is used to access and retrieve messages from newsgroups. TCP/IP port 110 is used by Post Office Protocol version 3 (POP3). POP3 is used to download email from mail servers.

Which port number is used by SNMP? a) 25 b) 110 c) 119 d) 161

161 Simple Network Management Protocol (SNMP) uses port 161. The other listed ports are used by the following protocols: SMTP uses port 25. POP3 uses port 110. NNTP uses port 119.

Which port does Telnet use? a) 23 b) 53 c) 25 d) 80

23 Telnet uses port 23. HyperText Transfer Protocol (HTTP) uses port 80. Simple Mail Transfer Protocol (SMTP) uses port 25. Domain Name System (DNS) uses port 53.

Rack heights vary from a few rack units to many rack units. The most common rack heights are 24U and 42U. How tall is a 24U rack? a) 42 inches b) 48 inches c) 36 inches d) 30 inches

42 inches

Multi-mode fiber is designed to operate at which of the following wavelengths? a) 1300 nm and 1550 nm b) 1310 nm and 1550 nm c) 850 nm and 1300 nm d) 850 nm and 1310 nm

850 nm and 1300 nm Multi-mode fiber is designed to operate at 850 nm and 1300 nm. Single-mode fiber is optimized for 1310 nm and 1550 nm.

While viewing the status of interfaces on a Cisco switch, you see an abnormally large number of CRC errors on one interface. This interface is connected to a user's workstation that is located in a cubicle on the second floor. What could cause this to happen? a) Collisions between two or more network hosts. b) Two hosts on the network with the same MAC address. c) An incorrect subnet mask configured on the workstation. d) A strong EMI emitter near the cable connected to that interface.

A strong EMI emitter near the cable connected to that interface.

Which of the following topologies connects all devices to a trunk cable? a) Star b) Ring c) Bus d) Mesh

Bus

You've implemented a network where hosts are assigned specific roles, such as file sharing and printing roles. Other hosts access those resources, but they don't host services of their own. Which type of network do you have? a) Client-server b) Peer-to-peer c) Intranet d) Extranet

Client-server

What is the basic purpose of the OSI Physical layer? a) Maintain a list of known networks and neighboring routers. b) Define when devices have access to the LAN. c) Coordinate rules for sending and receiving electrical signals. d) Define how physical network devices are identified on a network.

Coordinate rules for sending and receiving electrical signals.

You've decided to implement Gigabit Ethernet on your network; each switch port is connected to a single device. Following the installation, you find one device connected to a switch that's only running at 100 Mbps. Which of the following is MOST LIKELY the cause? a) A short b) Crosstalk c) Impedance d) Collisions

Crosstalk

You have a cable internet connection at home. The installer had connected the router near the outside wall of your house with RG6 cable. You move the cable router a distance of 50 meters using RG8 cables and special connector adapters. Which condition are you MOST LIKELY to experience? a) FEXT b) EMI c) Echo d) NEXT

Echo

Which of the following is the process of breaking a message into packets, adding controls and other information, and then transmitting the message through the transmission medium? a) Segmentation b) Transformation c) Encapsulation d) Sequencing

Encapsulation

What role does ARP play in the routing process? a) If a router does not know a destination device's MAC address, it sends an ARP broadcast containing the destination device's IP address and requesting its MAC address. b) ARP does not play any role in the routing process. Switches use ARP to map IP addresses to MAC addresses in collision domains. c) If a router knows a destination host's MAC and IP address, it sends an ARP request to update the other routers' routing tables. d) If a router does not know a destination device's IP address, it sends an ARP broadcast containing the destination device's MAC address and requesting its IP address.

If a router does not know a destination device's MAC address, it sends an ARP broadcast containing the destination device's IP address and requesting its MAC address.

Which of the following BEST describes how a switch functions? a) It connects multiple cable segments (or devices) and broadcasts frames to all of its ports. b) It connects multiple cable segments (or devices) and forwards frames to the appropriate segment. c) It connects multiple segments of different architectures. It translates frames and broadcasts them to all of its ports. d) It connects multiple segments of different architectures. It translates frames and forwards them to the appropriate segment.

It connects multiple cable segments (or devices) and forwards frames to the appropriate segment.

Which of the following are true about a MAC address? (Select two.) a) It is a 48-bit address. b) It is typically represented by octets of decimal numbers between 0-255. c) It is typically represented by hexadecimal numbers. d) It is a 32-bit address. e) It is a 64-bit address.

It is typically represented by hexadecimal numbers.

Which of the following is true about single-mode fiber optic network cabling? a) It's optimized for 850 nm and 1300 nm light sources. b) It has shorter segment lengths than multi-mode fiber optic cabling. c) Its central core is smaller than the standard multi-mode fiber optic cabling core. d) It's less expensive than multi-mode fiber optic cabling.

Its central core is smaller than the standard multi-mode fiber optic cabling core.

Which recommendation should you follow while using 110 blocks for connecting Cat5 and higher data cables? a) Keep wire pairs twisted up to within one half of an inch of the connector. b) Connect wires using the T568B standard. c) Connect wires using the T568A standard. d) Use C-5 connectors.

Keep wire pairs twisted up to within one half of an inch of the connector.

At which layer of the OSI model do hubs operate? a) Layer 3 b) Physical c) Data Link d) Internet

Physical Hubs operate at Layer 1, or the Physical layer of the OSI model.

You're adding new wires in your building for some new offices. The building has a false ceiling that holds the lights and provides an air path for heating and air conditioning. You'd like to run your Ethernet cables in this area. Which type of cable must you use? a) Fiber optic cables b) Cat 5e or Cat 6a cables c) STP cables d) Plenum-rated cable

Plenum-rated cable Plenum-rated cable is fire resistant and non-toxic. You must use plenum-rated cable to wire in air spaces used by heating and air conditioning systems

Which term does the OSI model use that's different from the TCP/IP model in reference to the terms frame, packet, and segment? a) Protocol data unit (PDU) b) Session c) Presentation d) HTTP

Protocol data unit (PDU)

Which tool should you use to extend network services beyond the demarc? a) Punch down tool b) Patch panel c) Crimper d) Tone generator

Punch down tool A demarc is the location where the local network ends and the telephone company's network begins. This location is usually at a punchdown block in a wiring closet. You use a punch down tool to attach wires to the punchdown block. A tone generator sends a signal on the wire. A crimping tool is used to attach connectors to wires. Patch panels permit circuits to be arranged and rearranged by plugging and unplugging respective patch cords on a mounted hardware assembly.

You have a small home network connected to the internet using an RG-6 cable. You need to move the router, but you can't find anymore RG-6 cabling. Which cable type could you use instead? a) Cat 5e b) RG-59 c) RG-58 d) Cat 3

RG-59 RG-6 has an impedance rating of 75 ohms. It's important to use coaxial cables with the same impedance rating, and only RG-59 is rated for 75 ohms. Connecting coaxial cables with Cat 3 and Cat 5e cables requires a media converter.

Which of the following connectors is used with Ethernet 100BaseTX networks? a) BNC b) ST c) GG45 d) RJ45

RJ45 RJ45 connectors are used with Ethernet 100BaseTX networks. RJ11 connectors are used with phone, dial-up internet, and DSL modem connections. BNC connectors are used with coaxial cable. GG45 connectors are used with Cat 7 cables and support 10-Gbps Ethernet (10GBASE-T).

Which of the following connector types would you most likely use to connect to a T1 WAN service? a) RJ45 b) RJ11 c) GG45 d) RJ48c

RJ48c An RJ48c connector is similar to an RJ45 connector, but it has different pin-outs. RJ48c connectors are commonly used for T1 WAN connections. RJ45 connectors are used for Ethernet. RJ11 connectors are used for dial-up (modem) connections and some DSL connections. GG45 are used with Cat 7 cabling.

Which of the following topologies connects each device to a neighboring device? a) Star b) Mesh c) Ring d) Bus

Ring

In the OSI model, what is the primary function of the Network layer? a) Ensure that packets are delivered with no loss or duplication. b) Route messages between networks. c) Enable communication between network clients and services. d) Transmit data frames.

Route messages between networks.

Which of the following hardware devices links multiple networks and directs traffic between networks? a) Repeater b) Bridge c) Hub d) Router

Router

Routing data between computers on a network requires several mappings between different addresses. Which of the following statements is true? a) Routers use ARP to resolve known IP addresses into MAC addresses. b) ICMP lets routers bypass the general network broadcast by providing a dynamic table of IP-to-MAC address mappings. c) Diskless workstations use ARP to ask a server for an IP address. d) Routers use DNS to resolve MAC addresses of diskless workstations into IP addresses based on the information contained in other routers' routing tables.

Routers use ARP to resolve known IP addresses into MAC addresses.

Your company has just acquired another company in the same city. You need to integrate the two email systems so that messages can be exchanged between email servers. Currently, each network uses an email package from a different vendor. Which TCP/IP protocol enables message exchange between systems? a) IMAP4 b) SMTP c) POP3 d) ICMP

SMTP

Which of the following connectors is used with fiber optic cables and requires that you use a twisting motion to connect it? a) F-type b) SC c) ST d) BNC

ST An ST connector is used with fiber optic cables and uses a twist-type connector. Use the mnemonic Set and Twist. An SC connector is used with fiber optic cables, but you plug it in instead of twist it in. F-type and BNC connectors employ a twist to connect, but they're used with coaxial cables.

TCP is a connection-oriented protocol that uses a three-way handshake to establish a connection to a system port. Computer 1 sends a SYN packet to Computer 2. Which packet does Computer 2 send back? a) SYN/RST b) ACK c) SYN/ACK d) RST

SYN/ACK

Which type of optical fiber is normally used to connect two buildings that are several kilometers apart? a) Single-mode fiber b) Coaxial cable c) Shielded twisted pair d) Multi-mode fiber

Single-mode fiber

Users report that the internet is no longer accessible. You suspect that the line connecting your building to the internet isn't working properly. Which of the following allows the service provider to remotely test the local loop? a) Demarc extension b) Horizontal cross connect c) Demarc d) Smartjack

Smartjack A smartjack is a special loopback plug installed at a WAN service's demarcation point. Technicians at the central office can send diagnostic commands to the plug to test connectivity between the central office and the demarc.

You have a small network that uses a switch to connect multiple devices. Which physical topology are you using? a) Ring b) Mesh c) Star d) Bus

Star

You're an application developer, and you're writing a program for exchanging video files through a TCP/IP network. You need to select a transport protocol that will guarantee delivery. Which TCP/IP protocol provides this capability? a) TCP b) FTP c) SIP d) UDP

TCP

Which of the following network services or protocols uses TCP/IP port 69? a) NNTP b) SMTP c) POP3 d) TFTP

TFTP

Match each TCP/IP layers with its function. Breaks the data into pieces.------------>Transport Prepares the data to be sent.---------->Application Adds physical addresses.--------------->Link Adds logical addresses.--------------->Internet

The Application layer prepares data to be sent through the network. The Transport layer breaks data into pieces called segments, adding sequencing and control information. The Internet layer converts segments into packets, adding logical network and device addresses. The Link layer converts packets into frames, adding physical device addressing information and a frame check sequence footer for error detection. It also converts the frames into bits (0s and 1s) for transmission across the transmission media.

Workstation2 needs to send data to Workstation3. Identify the Layer 2 and Layer 3 addresses Workstation2 will use to send the data by dragging the corresponding address from the list on the left to its location on the right. (image of setup) Layer 2 source address------------->080046987654 Layer 3 source address------------->192.168.10.12 Layer 2 destination address-------->000b5f2a2222 Layer 3 destination address--------->192.168.11.11

Workstation2 will use the following addresses to send the data: The source Layer 2 address is its own MAC address, which is 080046987654. The source Layer 3 address is its own IP address, which is 192.168.10.12. The destination Layer 2 address is the MAC address of the default gateway router, which is 000b5f2a2222. The MAC address is the address of the interface connected to the same subnet as Workstation2. The destination Layer 3 address is the IP address of the destination device (Workstation3), which is 192.168.11.11.

Why might you use an RJ11 connector? a) You want to connect a 10GBaseT network to a switch card using a Cat 6 cable. b) You want to connect your computer to the internet with a DSL modem. c) You want to upgrade your 10BaseT network to 100BaseTX. d) You want to connect your computer to a network using a Cat 7 cable.

You want to connect your computer to the internet with a DSL modem. RJ11 connectors are typically used for telephones and modems. RJ45 connectors are used for 100BaseTX. RJ45 connectors are used for 10GBaseT using Cat 6 cables. GG45 or TERA connectors are used with Cat 7 cables. References

What is the correct binary form of the decimal IP address 192.168.1.1? a) 11000000.10101000.00000001.00000001 b) 10101100.00010001.00000001.00000001 c) 11000000.10101000.00000010.00000001 d) 00001010.10101000.00000001.00000001

a) 11000000.10101000.00000001.00000001 The decimal equivalent of the 11000000.10101000.00000001.00000001 IP address is 192.168.1.1. To convert from binary to decimal, use the decimal equivalent of the following binary numbers: 10000000: 128 01000000: 64 00100000: 32 00010000: 16 00001000: 8 00000100: 4 00000010: 2 00000001: 1 For each bit position with a 1 value in the binary form of the address, add the decimal values for that bit. For example, the decimal equivalent of 11000000 is 128 + 64 + 0 + 0 + 0 + 0 + 0 + 0 = 192

Which of the following features does UDP provide? (Select two.) a) Connectionless datagram services b) Lost packet retransmission c) Low overhead d) Data packet sequencing e) Packet acknowledgement

a) Connectionless datagram services c) Low overhead

Which of the following are included as part of the Data Link layer specifications? (Select two.) a) Data transmission between hosts b) Physical topology c) Physical network device identification d) Digital data conversion e) Cable and connector specifications

a) Data transmission between hosts c) Physical network device identification

At which OSI model layer does a media converter operate? a) Layer 1 b) Layer 2 c) Layer 3 d) Layer 4

Layer 1 A media converter operates at Layer 1 of the OSI model, which is the Physical layer. The media converter translates frames into bits and transmits them on the transmission medium. At Layer 2, the MAC address is added to make the data into a frame. At Layer 3, the IP address is added to the packet. At Layer 4, the port and socket number are assigned.

You have a server that has a 100BaseFX network interface card you need to connect to a switch. The switch only has 100BaseTX switch ports. Which device should you use? a) Media converter b) Hub c) Bridge d) Repeater

Media converter Use a media converter to convert from one media type to another within the same architecture. Use a bridge to connect two devices that use different network architectures. For example, you can use a bridge to connect a wired network to wireless clients. A hub or repeater connects devices using the same media type.

Your manager has asked you to implement a network infrastructure that will accommodate failed connections. Which of the following network topologies provides redundancy for a failed link? a) Bus b) Star c) Mesh d) Ring

Mesh

You have a network that uses a logical bus topology. How do messages travel through the network? a) Messages travel from one device to the next until they reach the destination device. b) Messages are broadcast to all devices connected to the network. c) Messages are sent directly to the correct destination device. d) Messages are sent to a central device that forwards them to the destination devices.

Messages are broadcast to all devices connected to the network.

You have a network that uses a logical ring topology. How do messages travel through the network? a) Messages travel from one device to the next until they reach the destination device. b) Messages are sent to a central device that forwards them to the destination devices. c) Messages are sent directly to the destination device only. d) Messages are sent to all devices connected to the network.

Messages travel from one device to the next until they reach the destination device.

Which of the following geographic network types is typically managed by a city as a public utility? a) Local area network (LAN) b) Wide area network (WAN) c) Metropolitan area network (MAN) d) Personal area network (PAN)

Metropolitan area network (MAN)

You want to measure the voltage, amps, and ohms of various devices. Which tool should you use? a) Toner probe b) Multimeter c) Certifier d) Voltage event recorder

Multimeter A multimeter is a device that tests various electrical properties. For example, most multimeters can measure: AC and DC voltage Current (amps) Resistance (ohms) Capacitance Frequency

You have a large TCP/IP network and want to keep a host's real-time clock synchronized. Which protocol should you use? a) SNMP b) NTP c) SMTP d) FTP

NTP

At which OSI layer does a router operate to forward network messages? a) Data Link b) Transport c) Physical d) Network

Network

Which network component connects a device to transmission media and allows the device to send and receive messages? a) Client b) Network interface card c) Protocol d) Server

Network interface card

You're installing network wiring for a new Ethernet network at your company's main office building. The project specifications call for Cat 5e UTP network cabling and RJ45 wall jacks. Near the end of the project, you run out of wire before the last few runs are complete. You have a spool of Cat 3 network cable in storage. Upon closer inspection, it appears very similar to the Cat 5e wiring. To finish the project, should you use the Cat 3 cabling as a substitute for the Cat 5e cabling? a) No. Cat 5e cabling has more twists per inch than Cat 3 cabling, reducing crosstalk and supporting higher data rates. b) Yes. You can use Cat 3 cabling as a substitute for Cat 5e cabling since they're electrically identical. c) No. Cat 5e cabling uses a thicker copper wire than Cat 3 cabling, enabling higher data transmission rates. d) No. The sheath surrounding Cat 5e cabling is much thicker than the Cat 3 sheath, creating an extra layer of shielding that reduces crosstalk and supports higher data rates.

No. Cat 5e cabling has more twists per inch than Cat 3 cabling, reducing crosstalk and supporting higher data rates.

You're building a new network for a small financial services startup company. Security is paramount, so each organization within the company will have their own network segments separated by routers. Funds are limited, and you've been asked to keep costs to a minimum. You've acquired a used fiber optic switch, and you want to use it to create a fiber optic backbone that interconnects all of the routers. You've purchased several used multi-mode GBIC modules on eBay that you'll install on each router to allow them to connect to the switch. Both the switch and the GBIC modules use MTRJ connectors. You've purchased several used 1-meter, multi-mode patch cables from Amazon. But when they arrived, you noticed that they use LC connectors. Fortunately, with some force, you found that you're able to get the LC connectors on the cables to lock into the MTRJ connectors on the GBIC modules and on the switch. Will this implementation work? a) No. You should use a specialized backbone fiber optic switch to create a backbone network for routers. b) No. You should use single-mode patch cables to connect a GBIC module to a switch. c) Yes. All of the requirements for implementing a fiber optic network have been met. d) No. You should purchase patch cables that use MTRJ connectors.

No. You should purchase patch cables that use MTRJ connectors.

Which of the following statements accurately describe how a modem works? (Select two.) a) It demodulates analog data from a telephone network into digital PC data. b) It modulates digital data from a PC into analog data and transmits it on a telephone network. c) It modulates digital data from a telephone network into analog data that a PC can use. d) It communicates over a telephone network using digital signals. e) It demodulates analog PC data into digital data that can be transmitted through a telephone network.

a) It demodulates analog data from a telephone network into digital PC data. b) It modulates digital data from a PC into analog data and transmits it on a telephone network. Modem is shorthand for modulator/demodulator. A modem's job is to convert (or modulate) digital data from a PC into analog telephone signals and transmit them through a telephone network. Modems also receive analog data from the telephone network and convert (or demodulate) it into digital PC data.

Which of the following are characteristics of a coaxial network cable? (Select two.) a) It uses two concentric metallic conductors. b) It uses RJ45 connectors. c) It is composed of four pairs of 22-gauge copper wire. d) It has a conductor made from copper in its center. e) The conductors within the cable are twisted around each other to eliminate crosstalk.

a) It uses two concentric metallic conductors. d) It has a conductor made from copper in its center.

Which of the following connectors are used with fiber optic cables and include both cables in a single connector? (Select two.) a) LC b) SC c) BNC d) ST e) MTRJ

a) LC b) MTRJ LC and MTRJ connectors have both fiber optic cables in a single connector. ST and SC connectors hold a single strand of fiber optic cabling. A cable using either one has two connectors on each end. A BNC connector is used with coaxial cable.

You want a switch to have the ability to modify the media type the switch port supports. Which type of module might you use to make this possible? a) SFP b) GBIC c) MAC c) ARP d) QSFP

a) SFP b) GBIC A GBIC (gigabit interface converter) is a large transceiver that fits in a port slot. GBICs are used for Gigabit media, including copper and fiber optic. An SFP (small form-factor pluggable) is similar to a GBIC but is smaller in size. An SFP is sometimes called a mini-GBIC.

Which of the following are characteristics of an LC fiber optic connector? (Select two.) a) They use a housing and latch system similar to an RJ45 UTP connector. b) They use a one-piece bayonet connecting system. c) They are half the size of standard connectors. d) They can be used with either fiber optic or copper cabling. e) They are threaded.

a) They use a housing and latch system similar to an RJ45 UTP connector. c) They are half the size of standard connectors.

In the OSI model, which of the following functions are performed at the Presentation layer? (Select two.) a) End-to-end flow control b) Data encryption and compression c) Data frame transmission d) Data format specifications e) Network services

b) Data encryption and compression d) Data format specifications

Which of the following functions are performed by the OSI Transport layer? (Select three.) a) Consistent data formatting between dissimilar systems b) End-to-end flow control c) Reliable message delivery d) Data segmentation and reassembly e) Packet formatting for delivery through the medium f) Media access control, logical topology, and device identification g) Path identification and selection

b) End-to-end flow control c) Reliable message delivery d) Data segmentation and reassembly

Which of the following hardware devices regenerate a signal out of all connected ports without examining the frame or packet contents? (Select two.) a) Router b) Repeater c) Hub d) Switch

b) Repeater c) Hub

Which of the following connectors usually require polishing as part of the assembly process? (Select two.) a) F-type b) SC c) BNC d) RJ45 e) ST

b) SC e) ST The fiber optic cable assembly process is more complex than other assemblies. It's necessary to polish the exposed fiber tip to ensure that light is passed from one cable to the next with minimal dispersion.

Which of the following cables offers the best protection against EMI? a) Cat 5e b) Single-mode fiber optic c) Cat 5 d)RG-6

b) Single-mode fiber optic Fiber optic cables offer the best protection against electromagnetic interference (EMI).

What is the decimal form of the following binary IP address? 11001101.00111001.10101001.01000010 a) 238.90.202.99 b) 205.57.169.66 c) 190.42.154.51 d) 206.58.170.67

d) 205.57.169.66

Which of the following tasks is associated with the Session layer? a) Data block breakdown b) Port number assignment c) IP address assignment d) Connection establishment

d) Connection establishment

Which of the following are advantages of using fiber optic cabling for a network? (Select two.) a) Easy to work with b) No special training or equipment is required c) Lower installation cost d) Immunity to electromagnetic interference e) Greater cable distances without a repeater

d) Immunity to electromagnetic interference e) Greater cable distances without a repeater Compared to other types of cabling, fiber optic cabling allows greater cable distances without a repeater and is immune to electromagnetic interference. However, it is more costly, difficult to work with, and specialized training and equipment is required for installation.

Which of the following is a valid MAC address? a) FABC.875E.9BG6 b) 145.65.254.10 c) 95ABC2F4.ABC5.569D.43BF d) AB.07.CF.62.16.BD

AB.07.CF.62.16.BD MAC addresses are comprised of 12 hexadecimal digits (ranging from 0-9 and A-F). They're typically represented as three sets of four hexadecimal digits or six sets of two hexadecimal digits, separated with periods. Regardless of the grouping and separator values, you look for 12 hex digits to determine whether a MAC address is valid.

During network transmission, data is transferred to various routers, which forward the data to the appropriate network. If the source and destination network addresses reside on the same network, which protocol is used to determine the destination IP's MAC address? a) TCP b) HTTP GET c) ARP d) UDP

ARP

A host wants to send a message to another host that has an IP address of 115.99.80.157, but it does not know the destination device's hardware address. Which protocol can be used to discover the MAC address? a) ARP b) DNS c) IGMP d) ICMP

ARP Hosts use Address Resolution Protocol (ARP) to discover a host's hardware address. DNS is used to map hostnames to IP addresses. ICMP notifies routers of problems on the network and undeliverable packets. IGMP establishes multicast group memberships, which allows a computer to send a single network packet to multiple hosts on a network at the same time.

You need to replace a fiber optic cable that's connecting two switches together. You inspect the existing cable and determine that it uses LC connectors. You also notice that the cable's ferrule has a slight slant to it. Which polish grade should you use to replace the existing cable? a) Angled Physical Contact polish b) Flat Physical Contact polish c) Physical Contact polish d) Ultra Physical Contact polish

Angled Physical Contact polish

You're working with an older 10Base2 Ethernet network. Which of the following connector types will you MOST LIKELY encounter? a) RJ11 b) ST c) BNC d) F-type

BNC A 10Base2 Ethernet network (also called a thinnet) is an older type of network that uses coaxial cables with BNC connectors for communication. F-type connectors are used for cable and satellite TV connections as well as broadband cable connections. RJ11 connectors are typically used for dial-up and DSL connections. ST connectors are used with fiber optic cables.

Which of the following is a valid MAC address? a) C0-34-FF-15-01-8E b) 73-99-12-61-15 c) 34-9A-86-1G-B3-24 d) 83-5A-5B-0B-31-55-F1

C0-34-FF-15-01-8E

You are making Ethernet drop cables using Cat5e cables and RJ45 connectors. You need to remove the plastic coating over the cable to expose the individual wires. Which tool should you use? a) Cable stripper b) Snips c) Punch down tool d) Crimping tool

Cable stripper

Which of the following cable types often includes a solid plastic core that keeps the twisted pairs separated? a) Cat 6 b) Cat 5e c) Cat 3 d) Cat 5

Cat 6 Cat 6 cables include a solid plastic core that keeps the twisted pairs separated and prevents the cable from being bent too tightly. Cat 3, Cat 5, and Cat 5e don't include a solid plastic core that keeps the twisted pairs separated.

What is the purpose of a frame check sequence (FCS) footer? a) Hold segment data b) Control information c) Contain logical network addresses d) Checksum error detection

Checksum error detection

Which of the following describes the point where the service provider's responsibility to install and maintain wiring and equipment ends and the customer's begins? a) IDF b) Demarc c) Vertical cross connect d) Punch down block

Demarc When you contract with a local exchange carrier (LEC) for data or telephone services, they install a physical cable and a termination jack on your premises. The demarcation point (demarc) is the line that marks the boundary between the Telco equipment and the private network or telephone system. Typically, the LEC is responsible for all the equipment on one side of the demarc, and the customer is responsible for all the equipment on the other side of the demarc.

You've just signed up for a broadband home internet service that uses coaxial cabling. Which connector type will you MOST LIKELY use? a) F-type b) BNC c) RJ11 d) RJ45

F-type Use an F-type connector for broadband cable connections that use coaxial cabling. Use a BNC connector for 10Base2 Ethernet networks. Use an RJ11 connector for modem connections to a phone line. Use an RJ45 connector for an Ethernet network that uses twisted pair cabling.

You are the network administrator for a small organization. Recently, you contracted with an ISP to connect your organization's network to the internet. Since doing so, it has come to your attention that an intruder has invaded your network from the internet on three separate occasions. Which type of network hardware should you implement to prevent this from happening again? a) Hub b) Switch c) Router d) Firewall

Firewall

Which of the following creates a visual representation of physical components along with a clearly defined set of principles and procedures? a) Logical network diagram b) Rack diagram c) Floor plan d) Wiring diagram

Floor plan

Which of the following protocols allows hosts to exchange messages to indicate problems with packet delivery? a) IGMP b) TFTP c) ICMP d) DHCP

ICMP

Which of the following terms identifies the wiring closet in the basement or ground floor that typically includes the demarcation point? a) Horizontal cross connect b) 110 block c) MDF d) IDF

MDF

You're building a new network for a small financial services startup company. Security is paramount, so each organization within the company will have its own network segment separated by a router. However, funds are limited, and you've been asked to keep costs to a minimum. You've acquired a used fiber optic switch, and you want to use it to create a fiber optic backbone that interconnects all of the routers. You've purchased several used single-mode GBIC modules on eBay that you'll install on each router to allow them to connect to the switch. Both the switch and the GBIC modules use MTRJ connectors. You connect each module to the switch with 1-meter multimode patch cables. Will this implementation work? a) Yes. All of the requirements for implementing a fiber optic network have been met. b) No. You shouldn't use multi-mode patch cables with single-mode GBIC modules. c) No. You shouldn't use standard fiber optic switches to create a backbone network for routers. d) No. You should purchase fiber optic equipment that use FC connectors.

No. You shouldn't use multi-mode patch cables with single-mode GBIC modules.

You're working with an existing fiber optic installation in your building. You want to know the length of each cable that runs through the walls. Which tool should you use? a) Toner probe b) OTDR c) Smartjack d) Multimeter

OTDR An optical time domain reflector (OTDR) sends light pulses on a cable to discover information about the cable. The results of this test can be used to: Estimate a wire's length. Measure a cable's impedance. Identify locations of splices and connectors on a wire. Identify shorts, open circuits, and fault locations.

Your manager has asked you to implement a wired network infrastructure that will accommodate failed connections. You don't have a large budget, so you decide to provide redundancy for only a handful of critical devices. Which of the following network topologies should you implement? a) Partial mesh b) Bus c) Full mesh d) Star

Partial mesh

Which of the following terminates individual wires from a 25-pair or 100-pair cable using female RJ45 ports? a) Horizontal cross connect b) 110 block c) 66 block d) Patch panel

Patch panel

You've implemented a network where each device provides all other devices on the network with access to shared files. Which type of network do you have? a) Polling b) Client-server c) Peer-to-peer d) Multiple access

Peer-to-peer

Workstation3 has started communicating with Workstation2. It sends a frame to the default gateway. Identify the Layer 2 and Layer 3 addresses used by the Cisco 2600 router to forward the data to Workstation2 by dragging the corresponding address from the list on the left to its location on the right. Layer 2 source address------------->000b5f2a2222 Layer 3 source address------------->192.168.11.11 Layer 2 destination address--------->080046987654 Layer 3 destination address--------->192.168.10.12

The Cisco 2600 router is the default gateway. When it receives a frame from Workstation3, it examines the Layer 3 address in the packet to locate the destination device. Then it creates a new frame and modifies the source and destination Layer 2 addresses (MAC addresses) as follows: The source Layer 2 address is its own MAC address on the same segment as the destination device, which is 000b5f2a222. The destination Layer 2 address is the MAC address of the destination device, which is 080046987654. The source and destination Layer 3 addresses (IP addresses) do not change. The source IP address is the IP address of Workstation3, which is 192.168.11.11. The destination IP address is the IP address of Workstation2, which is 192.168.10.12.

Which of the following are characteristics of an MTRJ fiber optic connector? (Select two.) a) They use metal guide pins to ensure accurate alignment. b) They must never be used with single-mode fiber optic cables. c) They can be used with multi-mode fiber optic cables. d) They're called push-in-and-twist connectors. e) They use a keyed bayonet.

They can be used with multi-mode fiber optic cables. MTRJ connectors can be used with either multi-mode or single-mode fiber optic cabling. The connector is made from plastic and uses metal guide pins to ensure that it's properly aligned in the jack. ST has a keyed bayonet connector and is called a push-in-and-twist connector.

You've connected a cable certifier to an RJ45 wall jack, and the output shown below is displayed on the device. What does this output indicate? (Select two.) (Image cables crisscrossing connections) a) The cable is functioning correctly. b) This is a straight-through cable. c) This is a crossover cable. d) There are multiple open pins on this cable. e) There are multiple shorts on this cable.

This is a crossover cable. In this display, the cable being tested is a correctly wired crossover cable. Output with (x) characters between pins indicates that they're shorted. Straight-through connections are displayed using (-) characters in the cable certifier's output. Open connections are displayed with no characters or lines between pin numbers.

Which device sends signals from a computer onto a network? a) Gateway b) Router c) Transceiver d) Cable

Transceiver

You have a network that occupies all three floors of a building. The WAN service provider has installed the line in a wiring closet on the main floor. You have a wiring closet on the two remaining floors directly above the wiring closet on the main floor. What would you use to connect the wiring closets together? a) Demarc extension b) Vertical cross connect c) Smart jack d) Horizontal cross connect

Vertical cross connect

How do switches and bridges learn where devices are located on a network? a) When a frame enters a port, the destination IP address is copied from the frame header. b) When a frame enters a port, the source IP address is copied from the frame header. c) When a frame enters a port, the source MAC address is copied from the frame header. d) When a frame enters a port, the destination MAC address is copied from frame header.

When a frame enters a port, the source MAC address is copied from the frame header.

You're configuring a network firewall to allow SMTP outbound email traffic and POP3 inbound email traffic. Which of the following TCP/IP ports should you open on the firewall? (Select two.) a) 21 b) 443 c) 25 d) 143 e) 110

c) 25 e) 110 Simple Mail Transfer Protocol (SMTP) uses TCP/IP port 25. Post Office Protocol version 3 (POP3) uses TCP/IP port 110. File Transfer Protocol (FTP) uses TCP/IP port 21. Internet Message Access Protocol version 4 (IMAP4) uses TCP/IP port 143. Secure Sockets Layer (SSL) uses TCP/IP port 443.

In the OSI model, which of the following functions are performed at the Application layer? (Select two.) a) Device control for data transmission rates. b) Communication setup, maintenance, and teardown. c) Enabling of communication between network clients and services. d) Integration of network functionality into the host operating system. e) Standard setting for sending and receiving signals.

c) Enabling of communication between network clients and services. d) Integration of network functionality into the host operating system.