Network + Exam Review

Question 1

What are the three basic LAN topologies

Answer 1

Bus, Ring, and Star

Question 2

What common WAN topology often results in multiple connections to a single site (leading to a high degree of fault tolerance) and has one-to-many connections

Answer 2

MPLS (Multiprotocol Labe Switching)

Question 3

What is the term for a device that shares its resources with other network devices?

Answer 3

Server

Question 4

What network model draws a clear distinction between devices that share their resources and devices that share their resources and devices that do not?

Answer 4

Client-Server

Question 5

Which network topology or connection type can be implemented with only two endpoints?

Answer 5

Point-to-point

Question 6

What device is generally implemented as a star topology?

Answer 6

Hub or switch

Question 7

What does MPLS stand for?

Answer 7

Multiprotocol Label Switching

Question 8

What does WAN stand for?

Answer 8

Wide area network

Question 9

Will a computer that shares no resources most likely be connected to the backbone or to a segment?

Answer 9

A segment

Question 10

Which LAN topology is characterized by all devices being daisy-chained together with the devices at each end being connected to only one other device?

Answer 10

Bus

Question 11

Which layer chooses and determines the availability of communicating partners along with the resources necessary to make the connection, coordinates partnering applications, and forms a consensus on procedures for controlling data integrity and error recovery?

Answer 11

The Application layer is responsible for finding the network resources broadcast from a server and adding flow control and error control (if the application developer chooses)

Question 12

Which layer is responsible for converting frames from the Data Link layer into electrical signals?

Answer 12

The Physical Layer takes frames from the Data Link layer and encodes the 1s and 0s into a digital signal for transmission on the network medium

Question 13

At which layer is routing implemented, enabling connections and path selection between two end systems?

Answer 13

The Network layer provides routing through an internetwork and logical addressing

Question 14

Which layer defines how data is formatted, presented, encoded, and converted?

Answer 14

The Presentation layer makes sure that data is in a readable format for the Application layer

Question 15

Which layer is responsible for creating, managing, and terminating sessions between applications?

Answer 15

The Session layer sets up, maintains, and terminates sessions between applications

Question 16

Which layer manages the transmission of data across a physical link and is primarily concerned with physical addressing and the ordered delivery of frames?

Answer 16

Protocol data units (PDUs) at the Data Link layer are called frames. As soon as you see the word frame and/or term physical addressing in a question, you know the answer is always Data Link layer

Question 17

Which layer is used for reliable communication between end nodes over the network and provides mechanisms for establishing, maintaining, and terminating virtual circuits as well as controlling the flow of information?

Answer 17

The Transport layer uses virtual circuits to create a reliable connection between two hosts

Question 18

Which layer provides logical addressing that routers use for path determination?

Answer 18

The Network layer provides logical addressing, IP and/or IPv6 addressing, and routing

Question 19

Which layer specifies voltage, wire speed, and connector pin-outs and moves bits between devices?

Answer 19

The Physical layer is responsible for the electrical and mechanical connections between devices

Question 20

Which layer combines bits into bytes and bytes into frames and uses MAC addressing?

Answer 20

The Data Link layer is responsible for the framing of data packets

Question 21

Which UTP wiring uses four twisted wire pairs (eight wires) and is rated for 250 MHz?

Answer 21

Cat 6

Question 22

The point at which the operational control or ownership changes from your company to a service provider is referred to as what?

Answer 22

Demarcation point or demarc

Question 23

Which type of cable will you use to connect two switches to each other?

Answer 23

Crossover

Question 24

Which RG rating of coax is used for cable modems?

Answer 24

RG-6

Question 25

Which UTP uses four twisted pairs (eight wires), is rated for 100 MHz, and is capable of handling the disturbance on each pair caused by transmitting on all four pairs at the same time?

Answer 25

Category 5e

Question 26

You want to connect a host to a switch port. What type of Ethernet cable will you use?

Answer 26

Straight-through

Question 27

In what instance would you use T1 crossover cable?

Answer 27

To connect two CSU/DSUs

Question 28

T568A uses which pins to make a connection?

Answer 28

1,2,3, and 6

Question 29

A crossover uses which pins to make a connection?

Answer 29

1 to 3 and 2 to 6

Question 30

What are two advantages of fiber-optic cabling

Answer 30

It is completely immune to EMI and RFI and can transmit up to 40 kilometers (about 25 miles)

Question 31

Complete the following table to express 192.168.10.15 in binary format

Answer 31

11000000/10101000/00001010/00001111

Question 32

Complete the following table to express 172.16.20.55 in binary format

Answer 32

10101100/00010000/00010100/00110111

Question 33

Complete the following table to express 10.11.12.99 in binary format

Answer 33

00001010/00001011/00001100/01100011

Question 34

Complete the following table to express 11001100.00110011.10101010.01010101 in decimal IP address format

Answer 34

204/51/170/85

Question 35

Complete the following table to express 11000110.11010011.00111001.11010001 in decimal IP address format

Answer 35

198/211/57/209

Question 36

Complete the following table to express 10000100.11010010.10111000.10100110 in decimal Ip address format

Answer 36

132/210/184/166

Question 37

Complete the following table to express 110110000.00011011.00111101.01110110 in hexadecimal

Answer 37

D8/1B/3D/76

Question 38

Complete the following table to express 11001010.11110101.10000011.11101011 in hexadecimal

Answer 38

CA/F5/83/EB

Question 39

Complete the following table to express 10000100.11010010.01000011.10110011 in hexadecimal

Answer 39

84/D2/43/B3

Question 40

This device sends and receives information about the Network layer

Answer 40

Router

Question 41

This layer creates a virtual circuit before transmitting between two end stations

Answer 41

Transport

Question 42

A layer 3 switch or multilayer swithces

Answer 42

Router

Question 43

This device uses hardware addresses to filter a network

Answer 43

Bridge or Switch

Question 44

Ethernet is defined at these layers

Answer 44

Data Link and Physical

Question 45

This layer supports flow control and sequencing

Answer 45

Transport

Question 46

A malware attack encrypts the data on a critical network server. A dialog box displays on the server display screen with instructions about how to pay for a recovery code to decrypt the server data. Which type of attack does this scenario describe?

Answer 46

Ransomware

Question 47

Part of a company’s network is shown in the exhibit. Client computers are configured to receive IP addresses automatically from the DHCP server. All client computers currently have valid IP addresses. Computers on the 192.168.1.0 subnet are unable to resolve host names in other subnets but can access resources by IP address. Computers on other subnets are not experiencing this problem. What is the most likely cause?

Answer 47

Port 53 is blocked on the 192.168.1.1 interface

Question 48

A company deploys a server on its perimeter network. The server will be used for transferring files. Specific requirements include:
Users authenticate with a user ID and password
All communication between the server and client is encrypted
Open ports on the perimeter firewall are kept to a minimum
No certificate is required at the server or client
What should the company select as a solution?

Answer 48

SFTP

Question 49

A user reports their VoIP calls seem choppy. A network administrator is concerned congestion may be causing variation in packet delays. What should the administrator monitor to confirm this concern?

Answer 49

Jitter

Question 50

Which of the following is a limitation of vSwitch technology?

Answer 50

Network traffic cannot flow between vSwitches on the same host

Question 51

An organization wants to maximize performance for its wireless network. Which technology should the organization deploy?

Answer 51

802.11ax

Question 52

A network technician must ensure that nodes can send traps when performance thresholds are breached. Which solution BEST meets this requirement?

Answer 52

Deploy an SNMP management system and configure agents on nodes

Question 53

A network technician troubleshoots connectivity to a server. The technician needs to determine if a connection from a client is active as well as the port being used for the connection. Which tool should the technician use?

Answer 53

netstat

Question 54

A company needs a device to help centralize authentication, mitigate radio interference, provide load balancing, and improve bandwidth usage

Answer 54

Wireless controller

Question 55

A company needs to evenly distribute traffic between web servers deployed in its perimeter network

Answer 55

Load balancer

Question 56

A company needs to add a layer of protection between internal network hosts and external websites

Answer 56

Proxy server

Question 57

Which two are benefits of mesh-connected distribution routers?

Answer 57

Load balancing, Multipathing

Question 58

Which is considered solely a distance vector protocol?

Answer 58

RIP

Question 59

Most of a company’s network administrators are Windows operating system specialists. The company is cross training administrators to help perform periodic management and administrative tasks on Linux servers. This includes a mix of command-line and graphic utilities. Some of the administrators being trained are in remote offices. All trainers are in the company’s main office.
The administrators being trained log on and work locally from a Linux server. The trainer will connect to Linux server from a client computer. Both computers need to display the same screen and allow commands and utilities to be used from either computer.
Which remote connection technology should the trainers use?

Answer 59

VNC (Virtual Network Computing)

Question 60

This device can measure the distance to a remote network

Answer 60

Router

Question 61

Logical addressing is used at this layer

Answer 61

Network

Question 62

Hardware addresses are defined at this layer

Answer 62

Data Link (MAC Sublayer)

Question 63

This device creates one big collision domain and one large broadcast domain

Answer 63

Hub

Question 64

This device creates many smaller collision domains, but the network is still one large broadcast domain

Answer 64

Switch or Bridge

Question 65

This device can never run full-duplex

Answer 65

Hub

Question 66

This device breaks up collision domains and broadcast domains

Answer 66

Router

Question 67

What would an ARP destination MAC address appear as?

Answer 67

This would be a layer 2 broadcast, or FF:FF:FF:FF:FF