Network+ 8th edition, Chapter 1 review questions, Chapter 5: Cabling, Ch 4: Chapter Review Questions, Chapter 3: Addressing on Networks, Computer Network CH2 Review 8th Edition

What are some elements that are typically included in network diagrams?

Network diagrams may show physical layout, logical topology, IP address reserves, names of major network devices, and types of transmission data.

11. What is the name of the domain controller database that Windows Server 2016 uses to store data about user access and resources on the network?

AD (Active Directory)

17. At the Data Link layer, which type of network address is used to identify the receiving node?

MAC address

Which type of DNS record identifies an email server?

MX record

You issue a transmission from your workstation to the following socket on your LAN: 10.1.1.145:110. Assuming your network uses standard port designations, what Application layer protocol handles your transmission?

POP3 (Post Office Protocol 3)

What kind of tool can measure the distance to the location of damage in a cable?

Cable Performance Tester

What is the earliest twisted-pair cabling standard that meets the minimum requirements for 10GBase-T transmissions?

Cat6

How many bits does an IPv6 address contain?

128

What decimal number corresponds to the binary number 11111111?

255

Which of these is considered a secure place to store a list of documented network passwords?

A password manager

Which transmission characteristic is never fully achieved?

Bandwidth

Which OSI layer is responsible for directing data from one LAN to another? a. Transport layer b. Network layer c. Data Link layer d. Physical layer

b. Network Layer

5. Which application embedded in Windows operating systems allows remote control of a computer and uses the RDP secure protocol for transmissions? a. Telnet b. Remote Desktop c. SFTP d. SSH

b. Remote Desktop

Which protocol's header would a Layer 4 device read and process? a. IP b. TCP c. ARP d. HTTP

b. TCP

What characteristic of optical transmissions is primarily responsible for distance limitations

Cost and Optical loss

A technician from your ISP has arrived to help you troubleshoot a weak WAN connection. To what location do you take her?

Entrance facility

When your computer first joins an IPv6 network, what is the prefix of the IPv6 address the computer first configures for itself ?

FE80::/10

16. At the Network layer, what type of address is used to identify the receiving host?

IP address

You have just set up a new wireless network at your house, and you want to determine whether your Linux laptop has connected to it and obtained a valid IP address. What command will give you the information you need?

Ifconfig

What database does a router consult before determining the most efficient path for delivering a message?

Its routing table

What fiber is used in fiber-optic cabling to protect the inner core and prevent the cable from stretching ?

Kevlar (a polymeric fiber)

There is only one ___ per network, but there can be many ___ connecting internal portions of the network.

MDF, IDFs

Which protocol is supported by ICMPv6 to facilitate neighbor discovery on an IPv6 network?

NDP (Neighbor Discovery Protocol)

You have decided to use SNAT and PAT on your small office network. At minimum, how many IP address must you obtain from your ISP for all five clients in your office to be able to access servers on the Internet?

One

Suppose you're creating patch cables to be used in a government office. What color wire goes in the first pin?

Orange/White

You need to connect a new network printer to a nearby wall jack. What kind of cable should you use?

Patch cable

Which two fields in an Ethernet frame help synchronize device communications but are not counted toward the frame's size?

Preamble and SFD

Which part of a MAC address is unique to each manufacturer?

The OUI

What process is used to establish a TCP connection?

Three-way handshake

What type of diagram shows a graphical representation of a network's wired infrastructure?

Wiring schematic

Which two protocols manage neighbor discovery processes on IPv4 networks? a. ICMP and ARP b. IPv4 and IPv6 c. TCP and UDP d. BGP and OSPF

a. ICMP and ARP

4. Which email protocol allows an email client to read mail stored on the mail server? a. IMAP4 b. SMTP c. TCP d. POP3

a. IMAP4

What is the Internet standard MTU? a. 65,535 bytes b. 1,522 bytes c. 1,500 bytes d. 9,198 bytes

c. 1,500 bytes

A routing protocol's reliability and priority are rated by what measurement? a. Routing table b. MTU c. Latency d. AD

d. AD

When a router can't determine a path to a message's destination, where does it send the message?a. Default gateway b. Routing table c. Administrative distance d. Gateway of last resort

d. Gateway of last resort

3. Which email protocol allows an email client to download email messages to the local computer? a. IMAP4 b. SMTP c. TCP d. POP3

d. POP3

8. A network consists of seven computers and a network printer, all connected directly to one switch. Which network topology does this network use? a. Hybrid b. Mesh c. Star-bus d. Star

d. star

Which of these commands is available only in Linux?

dig

List some good names for devices on your home network or on the network in your school's lab. Demonstrate the use of best practices when creating a naming scheme for devices on a computer network.

hec-02-ne-01-rtr2: HEC building, 2nd floor, northeast corner, rack number, type of device, number of the device

13. What is the fundamental distinction between a node and a host?

host is a computer that hosts a resource on the network node is any computer that can be addressed on the network

If you are connected to a network that uses DHCP, and you need to terminate your Windows workstation's DHCP lease, which command would you use?

ipconfig /release

While troubleshooting a network connection problem for a coworker, you discover the computer is querying a nonexistent DNS server. What command-line utility can you use to assign the correct DNS server IP address?

nslookup in interactive mode

12. What is the fundamental distinction between a Layer 2 switch and router?

switch belongs only to one network router belongs to more than one network

Suppose you send data to the 11111111 11111111 11111111 11111111 IP address on an IPv4 network. To which device(s) are you transmitting?

All devices on your local network

What four functions do all routers perform?

*1.* Connect dissimilar networks. *2.* Interpret Layers 3 and 4 addressing and other information. *3.* Determine the best path for data to follow. *4.* Reroute traffic if a primary path is down but another path is available.

Suppose you're assisting with a cable installation using fiber-optic cabling that will support Gigabit Ethernet. You're approved to install segments up to 4000 m in length. What kind of cable are you using?

- 1000Base-LX - SMF (Single mode fiber)

What is the difference between short circuits and open circuits?

- A short circuit is an unwanted connection, such as when exposed wires touch each other. - An open circuit is one where needed connections are missing, such as when a wire breaks.

Give three examples of routing metrics used by routers to determine the best of various available routing paths.

(Any three) Hop count, theoretical bandwidth, actual throughput, path latency (or delay), path load, MTU, cost, reliability, network topology

What is a twist ratio and why is it important?

- The number of twists per meter or foot. - Affects the reduction or increase of attenuation. -The more twist per meter, the more it is resistant to cross-talk.

15. What is a message called that is delivered by TCP? What is a message called that is delivered by UDP? At which layer do the two protocols work?

segment; datagram; Layer 4: Transport Layer

6. A network consists of five computers, all running Windows 10 Professional. All the computers are connected to a switch, which is connected to a router, which is connected to the Internet. Which networking model does the network use? a. Star-bus b. Ring c. Hybrid d. Peer-to-peer

D. Peer-to-peer

What type of fiber cable problem is caused when pairing a 50-micron core cable with a 62.5-micron core cable?

Fiber type mismatch

When running a scan on your computer, you find that a session has been established with a host at the address 208.85.40.44:80. Which Application layer protocol is in use for this session? What command-line utility might you use to determine which computer is the host?

HTTP, nslookup

FTP sometimes uses a random port for data transfer, but an FTP server always, unless programmed otherwise, listens to the same port for session requests from clients. What port does an FTP server listen on?

Port 21

Which kind of multiplexing assigns slots to nodes according to priority and need?

STDM (Statistical time division multiplexing).

Why is SMF more efficient over long distances than MMF?

Signals traveling over multi-mode fiber experience greater attenuation than those traversing single-mode fiber.

How is latency measured, and in what unit?

The brief delay of electrons between the instant when data leaves the source and when it arrives at its destination. -Measured in milliseconds RTT (Round-trip-time) The time it takes to go from sender to receiver then back to sender.

How can you go about gathering the information needed to assemble a thorough operations manual?

Visits to data rooms, an examination of servers and desktops, a review of receipts for software and hardware purchases, and the use of a protocol analyzer or network management software package

Which device converts signals from a campus's analog phone equipment into IP data that can travel over the Internet?

VoIP gateway

14. What is the fundamental distinction between a MAN and a WAN?

WANs expand over a larger geographical area than MANs MANs cover a small geographical area. WANs cover a large geographical area

You've decided to run an Nmap scan on your network. What app could you open to perform this task? Choose all that apply.

Zenmap, Command prompt, Powershell

Which routing protocol does an exterior router use to collect data to build its routing tables? a. RIPv2 b. BGP c. OSPF d. IP

b. BGP

2. Which two encryption protocols might be used to provide secure transmissions for browser and web server communications? a. HTTP and HTTPS b. SSL and TLS c. SSL and HTTP d. TCP and UDP

b. SSL and TLS

10. Which type of address is used at the Transport layer to identify the receiving application? a. IP address b. Port c. MAC address d. Protocol

b. port

What is the range of addresses that might be assigned by APIPA?

169.254.0.1 through 169.254.255.254

For what time period should you schedule a network change?

A network change should be completed during off-hours where everyone must be informed of and agree to this maintenance window in advance.

List three IGPs (interior gateway protocols).

Any three) RIP, RIPv2, OSPF, IS-IS, EIGRP

Which of these categories of twisted-pair cable can support gigabit ethernet? - Cat5, Cat6, Cat7 - Cat5e, Cat6, Cat 3 - Cat5e, Cat6a, Cat7 - Cat6, Cat7a, Cat5

Cat5e, Cat6, Cat7

What kind of cable uses BNC connectors? Which connector is likely to be used?

Coaxial Cable; F-Connectors

What type of device does a computer turn to first when attempting to make contact with a host with a known IP address on another network?

Default gateway

What is the difference between dynamic ARP table entries and static ARP table entries?

Dynamic ARP table entries are created when a client makes an ARP request, whereas static ARP table entries are entered manually using the ARP utility.

In a large organization, how do you typically request permission to perform a network change?

In a large organization, when requesting a network change you may want to first submit a change request document, then understand and follow the approval process, have the change project-managed, provide additional documentation, and close the change.

18. A computer is unable to access the network. When you check the LED lights near the computer's network port, you discover the lights are not lit. Which layer of the OSI model are you using to troubleshoot this problem? At which two layers does the network adapter work?

Layer 1: Physical Layer, Layer 2: Data Link Layer

20. A user complains that Skype drops her videoconference calls and she must reconnect. At which layer of the OSI model should you begin troubleshooting? Which OSI layer is responsible for not dropping the Skype connection?

Layer 5: Session Layer, Layer 7: Application Layer

19. A user complains that he cannot access a particular website, although he is able to access other websites. At which layer of the OSI model should you begin troubleshooting this problem?

Layer 7: Application Layer

What is the first step of inventory management?

List all components on the network

A transceiver was recently damaged by a lightning strike during a storm. How might you decide whether the ISP is responsible for replacing this device, or whether your company must foot the bill?

Look at whether the device is located on the ISP's side of the demarc

Which fiber connector contains two strands of fiber in each ferrule?

MTRJ (Mechanical Transfer-Registered Jack)

Why is it important to minimize cable clutter in a rack?

Minimizing cable clutter can help prevent airflow blockages

Which kind of cross-talk occurs between wire pairs near the source of the signal?

NEXT (Near End Cross-Talk)

Suppose you want to change the default port for RDP as a security precaution. What port does RDP use by default, and from what range of numbers should you select a private port number?

RDP is normally assigned port 3389. If you want increased security, any port assigned from 49152 to 65535 should be ok.

Which computers are the highest authorities in the Domain Name System hierarchy?

Root servers

Which of the following devices are you likely to find in the MDF? Choose all that apply.

Routers, Switches, KVM switch

Which fiber transceiver is the same size as SFP transceivers, but can support network speeds over 10 Gbps?

SFP+

What three characteristics about TCP distinguish it from UDP?

TCP is connection-oriented, uses sequencing and checksums, and provides flow control.

Why do APC ferrules create less back reflection than UPC ferrules?

The end faces are placed at an angle to each other.

You have just brought online a new secondary DNS server and notice your network-monitoring software reports a significant increase in network traffic. Which two hosts on your network are likely to be causing the increased traffic and why?

The secondary and primary DNS servers, because the secondary server is requesting zone transfers from the primary server

Why is it important to use a structured cabling standard when installing and managing cabling systems?

The structured cabling standard describes the best way to maximize performance and minimize upkeep.

Which part of a toner and probe kit emits an audible tone when it detects electrical activity on a wire pair?

Tone-Locator

What kind of route is created when a network administrator configures a router to use a specific path between nodes? a. Trace route b. Static route c. Default route d. Best path

b. Static route

7. In question 6, suppose one computer is upgraded from Windows 10 Professional to Windows Server 2016. Which networking model can the network now support that it could not support without the upgrade? a. Hybrid b. Client-server c. Star-bus d. Ring

b. client-server

1. In the client-server model, what is the primary protocol used for communication between a browser and web server? a. FTP b. TCP c. HTTP d. SSL

c. HTTP

At which OSI layer does IP operate? a. Application layer b. Transport layer c. Network layer d. Data Link layer

c. Network Layer

9. In question 8, suppose a new switch is connected to the first switch by way of a network cable, and three computers are connected to the new switch. Which network topology is used? a. Hybrid b. Mesh c. Star-bus d. Star

c. star-bus

What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source? a. Source port b. Acknowledgement number c. DiffServ d. Checksum

d. Checksum

What is the unit of measurement that defines the space available in a rack? How tall are standard racks?

Rack Unit (RU)

If you're shopping for a rack switch, what component on the switch tells you it can be mounted to a rack?

Rack ears

Why is it important to use plenumrated cabling in the area above the ceiling tile?

Because it is coated with a flame-resistant jacket that produces less smoke when on fire

You are the network manager for a computer training center that allows students to bring their own laptops to class for learning and taking notes. Students need access to the Internet, so you have configured your network's DHCP server to issue IP addresses automatically. Which DHCP option should you modify to make sure you are not wasting addresses used by students who have left for the day?

DHCP lease time