Comptia Network+ Written Labs

Front 1

What are the three primary LAN topologies?

Back 1

Bus, ring, and star

Front 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?

Back 2

Multiprotocol Label Switching (MPLS)

Front 3

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

Back 3

Server

Front 4

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

Back 4

Client-server

Front 5

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

Back 5

Point-to-point

Front 6

What device is an example of an Ethernet technology implemented as a star topology?

Back 6

Hub

Front 7

What does MPLS stand for?

Back 7

MultiProtocol Label Switching

Front 8

What does WAN stand for?

Back 8

Wide area network

Front 9

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

Back 9

A segment

Front 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?

Back 10

Bus

Front 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?

Back 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).

Front 12

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

Back 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.

Front 13

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

Back 13

The Network layer provides routing through an internetwork and logical addressing.

Front 14

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

Back 14

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

Front 15

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

Back 15

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

Front 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?

Back 16

Protocol Data Units (PDUs) at the Data Link layer are called frames. As soon as you see frame in a question, you know the answer.

Front 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?

Back 17

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

Front 18

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

Back 18

The Network layer provides logical addressing, typically IP addressing, and routing.

Front 19

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

Back 19

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

Front 20

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

Back 20

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

Front 21

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

Back 21

Category 6

Front 22

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

Back 22

Demarcation point or demarc

Front 23

Which type of cable will you use to connect switches?

Back 23

Crossover

Front 24

Which RG rating of coax is used for cable modems?

Back 24

RG-6

Front 25

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

Back 25

Category 5e

Front 26

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

Back 26

Straight-through

Front 27

In what instance would you use T1 crossover cable?

Back 27

To connect two CSU/DSUs

Front 28

568A uses which pins to make a connection?

Back 28

1, 2, 3, and 6

Front 29

568B uses which pins to make a connection?

Back 29

1 to 3 and 2 to 6

Front 30

What are two advantages of fiber-optic cabling?

Back 30

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

Front 31

Express the following in binary format: 192.168.10.15

Back 31

11000000.10101000.00001010.00001111

Front 32

Express the following in binary format: 172.16.20.55

Back 32

10101100.00010000.00010100.00110111

Front 33

Express the following in binary format: 10.11.12.99

Back 33

00001010.00001011.00001100.01100011

Front 34

Express the following in decimal IP address format:
11001100.00110011.10101010.01010101

Back 34

204.51.170.85

Front 35

Express the following in decimal IP address format:
11000110.11010011.00111001.11010001

Back 35

198.211.57.209

Front 36

Express the following in decimal IP address format:
10000100.11010010.10111000.10100110

Back 36

132.210.184.166

Front 37

Express the following in hexadecimal format:
11011000.00011011.00111101.01110110

Back 37

D8.1B.3D.76

Front 38

Express the following in hexadecimal format:
11001010.11110101.10000011.11101011

Back 38

CA.F5.83.EB

Front 39

Express the following in hexadecimal format:
10000100.11010010.01000011.10110011

Back 39

84.D2.43.B3

Front 40

A Layer 3 switch, or multilayer switch

Back 40

Router

Front 41

This device sends and receives information about the Network layer.

Back 41

Router

Front 42

This device can measure the distance to a remote network.

Back 42

Router

Front 43

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

Back 43

Transport

Front 44

This device uses hardware addresses to filter a network.

Back 44

Bridge or switch

Front 45

Ethernet is defined at these layers.

Back 45

Data Link and Physical

Front 46

This layer supports flow control and sequencing.

Back 46

Transport

Front 47

Logical addressing is used at this layer.

Back 47

Network

Front 48

Hardware addresses are defined at this layer.

Back 48

Data Link (MAC sublayer)

Front 49

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

Back 49

Hub

Front 50

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

Back 50

Switch or bridge

Front 51

This device can never run full duplex

Back 51

Hub

Front 52

This device breaks up collision domains and broadcast domains.

Back 52

Router

Front 53

What might be the problem if a DHCP client suddenly finds itself in a different IP subnet from the one it should be in?

Back 53

The most likely problem is that a rogue DHCP server has been introduced into the network and is handing this device an incorrect lease.

Front 54

Name the protocol that uses both TCP ports 20 and 21.

Back 54

FTP uses both TCP ports 20 and 21 for the data channel and the control channel, respectively.

Front 55

What two Transport layer protocols does a DNS server use?

Back 55

A DNS server uses TCP port 53 for zone transfers and UDP port 53 for name resolutions.

Front 56

Which protocol dynamically reports errors to source hosts by using IP directly to build packets?

Back 56

ICMP uses IP directly to build error-reporting packets that are transmitted back to the originating source host when issues arise during the delivery of data packets. ICMP is also used during ping and some Traceroute operations.

Front 57

What could cause a server that you can ping not to provide the particular TCP/IP service, such as FTP, HTTP, and so on, that you expect it to offer?

Back 57

Quite simply, the service might not be running currently on that server. Another possibility might be that a firewall between the client and the server has blocked the protocol in question from passing.

Front 58

What might cause your email to stop functioning properly when you change Internet service providers?

Back 58

Most ISPs have their own mail servers. When you switch service, you might need to point your mail application to the servers provided by the new service provider.

Front 59

Which Unix command is used for terminal emulation in the same way Telnet is used?

Back 59

The Unix command rlogin functions similarly to Telnet.

Front 60

What protocol is at the heart of the ping and tracert commands in a Windows operating system?

Back 60

ICMP is the protocol that the ping and tracert commands rely on. If you’re having trouble getting pings and Traceroutes through a router, you might need to check if ICMP is being allowed thorough.

Front 61

Which destination Transport layer protocol and port number does a TFTP client use to transfer files over the network?

Back 61

TFTP servers respond to UDP messages sent to port 69.

Front 62

What well-known port number do SMTP servers use?

Back 62

SMTP uses TCP port 25

Front 63

What well-known port number do POP3 servers use?

Back 63

POP3 uses TCP port 110

Front 64

What well-known port number do RDP servers use?

Back 64

RDP uses TCP port 3389

Front 65

What well-known port number do IMAP4 servers use?

Back 65

IMAP4 uses TCP port 143

Front 66

What is the valid range used for a class A private IP address?

Back 66

10.0.0.0 through 10.255.255.255

Front 67

What is the valid range used for a class B private IP address?

Back 67

172.16.0.0 through 172.31.255.255

Front 68

What is the valid range used for a class C private IP address?

Back 68

192.168.0.0 through 192.168.255.255.

Front 69

Name some of the benefits of IPv6 over IPv4.

Back 69

IPv6 has the following characteristics, among others, that make it preferable to IPv4: more available addresses, simpler header, options for authentication and other security.

Front 70

What is the term for the auto-configuration technology responsible for addresses that start with 169.254?

Back 70

Automatic Private IP Addressing (APIPA) is the technology that results in hosts automatically configuring themselves with addresses that begin with 169.254.

Front 71

What defines a unicast address?

Back 71

An IP address assigned to an interface

Front 72

What defines a multicast address?

Back 72

One-to-many address

Front 73

What is the name for a 48-bit (6-byte) numerical address physically assigned to a network interface, such as a NIC?

Back 73

A MAC address, sometimes called a hardware address or even a burned-in address

Front 74

What gives IPv6 the ability to reference more addresses than IPv4?

Back 74

The fact that it has 128-bit (16-octet) addresses, compared to IPv4’s 32-bit (4-octet) addresses

Front 75

What is the Class C range of values for the first octet in decimal and in binary?

Back 75

192–223, 110xxxxx

Front 76

What is the 127.0.0.1 address used for?

Back 76

Loopback or diagnostics

Front 77

What is the Class A range of values for the first octet in decimal and in binary?

Back 77

1-126, 0xxxxxxx (Except for 00000000(0), which designates the default route, and 01111111(127), which is reserved for diagnostics)

Front 78

What is the Class B range of values for the first octet in decimal and in binary?

Back 78

128-191, 10xxxxxx