infx 247 questions

Which of the following features does UDP provide? (Select two.)

-Connectionless datagram services -Low overhead

In the OSI model, which of the following functions are performed at the Presentation layer? (Select two.)

-Data encryption and compression -Data format specifications

Which of the following are included as part of the Data Link layer specifications? (Select two.)

-Data transmission between hosts -Physical network device identification

Which of the following functions are performed by the OSI Transport layer?

-End-to-end flow control -Reliable message delivery -End-to-end flow control

Which of the following are advantages of using fiber optic cabling for a network? (Select two.)

-Greater cable distances without a repeater -Immunity to electromagnetic interference

Which of the following hardware devices regenerate a signal out of all connected ports without examining the frame or packet contents? (Select two.)

-Hub -Repeater

In the OSI model, which of the following functions are performed at the Application layer? (Select two.)

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

Which of the following are true about a MAC address? (Select two.)

-It is a 48-bit address. -It is typically represented by hexadecimal numbers.

Which of the following statements accurately describe how a modem works? (Select two.)

-It modulates digital data from a PC into analog data and transmits it on a telephone network. -It demodulates analog data from a telephone network into digital PC data.

Which of the following are characteristics of a coaxial network cable? (Select two.)

-It uses two concentric metallic conductors. -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.)

-LC -MTRJ

You are preparing to attach wires in a 110 block. You want to connect the wires and trim off the excess at the same time. Which of the following should you do?

-Point the cut side of the tool towards the wire end. -Use a punch down tool with a notched blade.

Which of the following connectors usually require polishing as part of the assembly process? (Select two.)

-ST -SC

Which of the following are characteristics of an MTRJ fiber optic connector?

-They can be used with multi-mode fiber optic cables. -They use metal guide pins to ensure accurate alignment.

Which of the following are characteristics of an LC fiber optic connector? (Select two

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

Which of the following uses metal clips placed over plastic slots to connect individual copper wires?

110 block

Multi-mode fiber is designed to operate at which of the following wavelengths?

850 nm and 1300 nm

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?

ARP

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?

ARP

You're working with an older 10Base2 Ethernet network. Which of the following connector types will you MOST LIKELY encounter?

BNC

Which of the following topologies connects all devices to a trunk cable?

Bus

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?

Cable stripper

Which of the following cable types often includes a solid plastic core that keeps the twisted pairs separated?

Cat 6

What is the purpose of a frame check sequence (FCS) footer?

Checksum error detection

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?

Client-server

Which of the following tasks is associated with the Session layer?

Connection establishment

What is the basic purpose of the OSI Physical layer?

Coordinate rules for sending and receiving electrical signals.

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?

Demarc

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?

Encapsulation

You've just signed up for a broadband home internet service that uses coaxial cabling. Which connector type will you MOST LIKELY use?

F-type

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?

Firewall

Which of the following creates a visual representation of physical components along with a clearly defined set of principles and procedures?

Floor plan

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?

GBIC SFP

Which of the following protocols allows hosts to exchange messages to indicate problems with packet delivery?

ICMP

What role does ARP play in the routing process?

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?

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

Which of the following is true about single-mode fiber optic network 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?

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

At which OSI model layer does a media converter operate?

Layer 1

Which of the following terms identifies the wiring closet in the basement or ground floor that typically includes the demarcation point?

MDF

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?

Media converter

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?

Mesh

You have a network that uses a logical bus topology. How do messages travel through the network?

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?

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?

Metropolitan area network (MAN)

You have a large TCP/IP network and want to keep a host's real-time clock synchronized. Which protocol should you use?

NTP

At which OSI layer does a router operate to forward network messages?

Network

Which network component connects a device to transmission media and allows the device to send and receive messages?

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?

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

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?

Partial mesh

Which of the following terminates individual wires from a 25-pair or 100-pair cable using female RJ45 ports?

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?

Peer-to-peer

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?

Plenum-rated cable

Which term does the OSI model use that's different from the TCP/IP model in reference to the terms frame, packet, and segment?

Protocol data unit (PDU)

Which tool should you use to extend network services beyond the demarc?

Punch down tool

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?

RG-59

Which of the following connectors is used with Ethernet 100BaseTX networks?

RJ45

Which of the following connector types would you most likely use to connect to a T1 WAN service?

RJ48c

Which of the following topologies connects each device to a neighboring device?

Ring

In the OSI model, what is the primary function of the Network layer?

Route messages between networks.

Which of the following hardware devices links multiple networks and directs traffic between networks?

Router

Routing data between computers on a network requires several mappings between different addresses. Which of the following statements is true?

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?

SMTP

Which of the following connectors is used with fiber optic cables and requires that you use a twisting motion to connect it?

ST

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?

SYN/ACK

Which type of optical fiber is normally used to connect two buildings that are several kilometers apart?

Single-mode fiber

Which of the following cables offers the best protection against EMI?

Single-mode fiber optic

You have a small network that uses a switch to connect multiple devices. Which physical topology are you using?

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?

TCP

Which device sends signals from a computer onto a network?

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?

Vertical cross connect

How do switches and bridges learn where devices are located on a network?

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

Why might you use an RJ11 connector?

You want to connect your computer to the internet with a DSL modem.

At which layer of the OSI model do hubs operate?

physical