Computer Networking MCQs (FREE Multiple Choice Questions)

1: In the Command Prompt, what is the command to show the most detailed printout of IP address info?

A. ipconfig

B. ping

C. itconfig

D. ipconfig /all

2: Given the IP address 82.77.201.1/24, what is the network number?

A. 82.77.0.0

B. 82.0.0.0

C. 82.77.201.255

D. 82.77.201.0

3: What is the normal reach of a signal from a wireless router?

A. Depends on the physical constructs of the environment, e.g., walls.

B. 1000 feet

C. 30 feet

D. 200 feet

4: When using the PING utility, what are you trying to accomplish?

A. Tracing the route that a IP packet is taking

B. Determining if a TCP connection can be established

C. Are ICMP ports opened on the remote end?

D. Does connectivity exist between two IP end points

5: The name of unit exchanged at network layer is called:

A. Packets

B. TPDU

C. Frames

D. Bits

6: Which IP address is reserved for loopback testing and debugging?

A. 127.256.0.1

B. 192.168.1.1

C. 0.0.0.0

D. 127.0.0.1

7: Open System Interconnection (OSI) Model has following layers:

A. 6

B. 7

C. Its not a layered architecture.

D. 5

8: Which is the best example of a secure password?

A. MySpecialPa$$w0rd

B. Xyz

C. mysecretpassword

D. Keep this place private

E. password12345

9: Port number of HTTP is:

A. 80

B. 90

C. 65

D. 21

10: How many layers are there in the OSI model?

A. 7

B. 10

C. 8

D. 3

11: What is NIC?

A. Network Interface Card

B. New Internet Card

C. Net Interface card

D. National Integration Circuit

12: Can computers with different operating systems communicate over a network?

A. No, this is one of the limitations of current operating systems.

B. No, this is one of the limitations of current networking technologies.

C. Yes, but special software is required.

D. Yes, network communication is operating system independent. What is important is if the computers are using the same protocol.

13: Is it possible to connect two computers without using any hubs or routers for network communication?

A. Yes, using a cross-over cable.

B. No, networking was not meant to work that way.

C. No, not withough special equipment that is very expensive.

14: Which of the following is an Ethernet connector type?

A. RJ-45

B. RJ-69

C. RJ-11

D. RJ-15

E. RJ-47

15: What type of network is commonly used in houses?

A. MAN

B. LAN

C. PAN

D. WAN

16: Which of the following is NOT a protocol?

A. HTTP

B. IP

C. PP

D. TCP

17: What is bandwidth?

A. The physical size of a networking cable.

B. The size of a rock band.

C. Transmission rate.

18: Which of the following is a connection oriented protocol?

A. RTP

B. TCP

C. UDP

D. TFTP

19: Which of the following is not a network topology?

A. Ring

B. Bus

C. Star

D. Access

20: A firewall in a Computer Network is a

A. system to prevent unauthorized access.

B. Physical boundary of network

C. simple web browsing software.

D. None of these

21: TCP is a ___ protocol.

A. Connectionless

B. Connection Oriented

C. Unreliable

D. Best Effort

22: What is a MAC address?

A. The network address for a computer running Mac OSX.

B. Another name for an IP address.

C. A number associated with an IP address to direct network communication to a specific application.

D. A unique hardware identification number for a network card.

23: Which command will display the assigned IP address of a network adpater installed on a Windows XP system?

A. WinIP

B. Ipadapter/all

C. Ipconfig

D. Configip

E. Winip/all

24: Which of the following is NOT an example of a client/server?

A. Web browser/server

B. email client/server

C. Peer-to-Peer between hosts.

25: Which protocol is used for email transmission?

A. IP

B. IMAP

C. DHCP

D. FTP

26: ADSL stands for:

A. Asymmetric dual smart line

B. Asymmetric digital subscriber line

C. None of these

D. Asymmetric double system line

27: Is it possible for a computer on local network A to talk to a computer on a local network B?

A. Yes, but it must be done via a wireless network between the local networks.

B. Yes only if an entry-point (such as a router) for each local network is provided.

C. No, not withough special equipment that is very expensive.

D. No

28: What is a handshake?

A. The closing of communication between two hosts.

B. The intial set-up between two communicating hosts.

C. A gesture of frustration from a network administrator.

29: Which is example of wireless encryption?

A. PPP

B. WPA

C. VPN

D. IPSec

E. MAC

30: What technology exists that allows a non-routable IP address to communicate with the global IP Internet Network.

A. eBGP

B. NAT (Network Address Translation)

C. CIDR Network address

D. Route Summarization

31: What is currently the most common and fastest transmission rate for ethernet cables?

A. 56k

B. 10-base

C. Gigabit

D. Megabit

32: When can a wireless device NOT connect to a wireless network?

A. If the wireless device supports wireless B and the wireless router only supports wireless G.

B. If the wireless device has a MAC address blocked by the wireless router.

C. If the wireless device does not support the security encryption of the wireless router.

D. All of these.

33: What is the maximum supported distance for an Ethernet cable run?

A. 150 m / 492 ft

B. 50m / 164 ft

C. 100m / 328 ft

D. 200 m / 656 ft

34: Which one is connectionless protocol?

A. TCP

B. UDP

35: What is the purpose of a static IP?

A. None of these

B. To ensure stability on the entire network.

C. To gaurantee the IP of the computer/server will not change.

D. To limit the transmision rate of a computer/server.

36: Which of the following is NOT an application layer protocol for email?

A. TCP

B. IMAP

C. POP

D. SMTP

37: Which item is an example of a physical network address?

A. IP address

B. MAC address

C. Mrbig@proprofs.com

D. Workstation name

E. www.proprofs.com

38: Which of the network type covers the country level location:

A. Wide area Network

B. Personal Area Network

C. Internet

D. Local Area Network

39: Can a computer also act as a router?

A. Yes

B. No

40: Which of the following describes how two communicating parties exchange information?

A. Service

B. Protocols

C. Interface

D. Information access

41: When you connect two network switches or two computers directly what type of Ethernet cable do you need?

A. Connector

B. Straight through

C. Cross-over

42: FTP client contacts FTP server at port:

A. 8080

B. 80

C. 21

43: A user loads a web browser and browses to http://www.google.com, what is the highest layer of the OSI model the user is functioning at?

A. Transport Layer

B. Application Layer

C. Network Layer

D. Session Layer

44: What is the purpose of an IP?

A. To limit the number of user errors on a network, hence Idiot Proof.

B. To identify an application running on a network.

C. To uniquely identify a host computer on a network.

D. To provide a host computer on the network an identity.

45: What is the maximum Ethernet cable length between repeaters (computers or switches)?

A. 200 m (656 feet)

B. 100 m (328 feet)

C. 60 m (197 feet)

D. 120 m (394 feet)

E. 50 m (164 feet)

46: Is it possible to program at the socket level?

A. No

B. Yes

47: How is data transferred over a network?

A. One byte at a time.

B. All the data is transfered at once.

C. Through clusters of bits called bytes.

D. Through chunks called packets.

48: The process in which information packets are forwarded to hops is called:

A. None of these

B. Communication

C. Switching

D. Routing

49: Which of the following major networks contain an incorrect subnet mask?

A. Class B with a mask 255.255.0.0 or /16

B. Class A with a mask 255.0.0.0 or /8

C. Class D with a mask 255.255.255.255 or /32

D. Class C with a mask 255.255.255.0 or /24

50: Which device is the central device of star topology?

A. Server

B. Router

C. Fibre

D. Hub/Switch

51: UDP is an unreliable protocol.

A. True

B. False

52: What is the difference between network address and port number?

A. Network address resolve the address of hardware device and port number search and identify software application.

B. Network address resolve the address of software application and port number search and identify hardware device.

53: Which of the given TCP/IP protocols can assign a logical address to a host?

A. UDP

B. TCP

C. IP

D. SMTP

E. CAD

54: What is considered part of a network core?

A. Hosts

B. Routers

C. Server

D. Applications

55: What best describes a client/server model?

A. When one host requests information from another host.

B. A client host requests a service from an always-on server.

C. The relationship between a patron of a business and a employee of that business.

56: Print server uses ________ which is a buffer that holds data before it is send to the printer.

A. None of these

B. Queue

C. Spool

D. Node

57: What is a protocol?

A. A protocol is a standard for communications over wireless networks.

B. A protocol dictates how a computer joins a network.

C. A protocol defines the order and format of messages within a network.

58: IPv6 address space is:

A. 2^16

B. 2^64

C. 2^32

D. 2^128

59: The default MTU of a typical Ethernet is

A. 1476

B. 1384

C. 1458

D. 1500

60: Hub is a ----------- device.

A. Unicast

B. Multicast

C. Anycast

D. Broadcast

61: Which switching type has the re-route capability:

A. Circuit Switching

B. Packet Switching

C. None of them

62: What is the second layer (layer 2) of the OSI model?

A. Session

B. Network

C. Transport

D. Physical

E. Data Link

63: Which IPv4 address is not valid?

A. 192.168.0.5

B. 8.8.8.8

C. 25.740.265.70

D. 169.254.0.8

E. 10.10.0.5

64: ____ protocol is used by Telnet.

A. IP

B. TCP

C. UDP

D. DHCP

65: Technically, what is the difference between HUB and Switch?

A. Switch operate using a broadcast model and Hub operate using a virtual circuit model

B. None of Them

C. Hub operate using a broadcast model and switches operate using a virtual circuit model

66: Which service reduce the response time for client request and satisfy client request without involving origin server.

A. User-Server state

B. Web Caching(Proxy Server)

C. Cookies

D. Client server state

67: If you wanted to test to see if a TCP port was opened on a server, what command/tool would you use?

A. Firefox

B. FTP

C. Ping

D. Telnet

68: Which are the default settings for a Windows XP computer network adapter?

A. Static IP address and configured as part of a domain.

B. There is no default settings for a Windows XP network adapter card.

C. Static IP address and configured as part of aworkgroup.

D. DHCP and configured as a part of a domain.

E. DHCP and configured as part of a workgroup.

69: Which of the following is/are NOT the difference between TCP and UDP?

A. Delivery of data is guaranteed in TCP whereas it cannot be guaranteed in UDP

B. Sequencing of data is a feature of TCP whereas there is no sequencing of data in UDP

C. TCP is a connection oriented protocol whereas UDP is datagram oriented protocol

D. All of them are correct

E. Re-transmission of lost packets is possible in TCP whereas in UDP, it is not possible

70: Where is a hub specified in the OSI model?

A. Application layer

B. Session layer

C. Data Link layer

D. Physical layer

71: What fields in the header of an IP packet will be decremented by one that is passed through each router?

A. The Type of Service

B. The Time to Live (TTL)

C. The Header Checksum

D. The Protocol Number

72: A server that has HTTP services and SMTP services bound to an interface functions with what protocol?

A. DHCP

B. UDP

C. TCP

D. IP

73: What does the term "Map Network Drive" mean?

A. Divide the host HDD into memory locations.

B. Trace the path to the local area network gateway.

C. Create a shortcut to a network location.

D. Send instructions to a user to access the remote local area network.

E. A schematic drawing of all network adapter locations on the network system.

74: Which of the following IP addresses is a class A Network?

A. 191.77.56.1

B. 0.0.0.1

C. 192.35.111.1

D. 128.30.33.1

75: Who initiates a connection between a client and server?

A. Sockets

B. Client

C. Server

D. Router

76: A network with more than one exit point.

A. application developers can change only one layer's protocols at a time.

B. To create a layered model larger than the DoD model.

C. different networks could communicate.

D. Cisco could use the model.

77: IP Addresses are 48 bit addresses and MAC addresses are 32 bit addresses written in hexadecimal format

A. True

B. False

78: Which network type can have transmission of data in both directions but not simultaneously.

A. None of these

B. Full Duplex

C. Simple

D. Half Duplex

79: Skype is an example of:

A. peer-to-peer model (Hybrid)

B. None of the above

C. End systems(hosts)

D. Client/Server model

80: What is the subnet mask of this network: 192.168.0.0/29

A. 192.168.0.1

B. 255.255.255.0

C. 255.255.255.248

D. 255.255.255.29

E. 192.168.0.255

81: Which network topology is based on a hierarchy of nodes?

A. Ring

B. Tree

C. Bus

D. Mesh

82: In TCP/IP model, TCP and UDP protocols work on which layer:

A. Transport layer

B. Application layer

C. Physical layer

D. Network layer

83: Which is NOT a wireless network signal?

A. G

B. B

C. C

D. A

84: Does P2P require an always on server?

A. Sometimes

B. No

C. Yes

85: For 802.11b wireless, how many frequency channels are available to avoid collisions/interference?

A. 5

B. 24

C. 11

D. 10

86: A router that responds to an ARP request intended for a remote host is called what?

A. Proxy IP

B. Proxy ARP

C. Gratutious ARP

D. Inverse ARP

87: The name of unit exchanged at Data Link Layer is called:

A. Unit

B. Frames

C. Packets

D. TPDU

88: Which topology has a single point failure, i.e. One cable broken whole network is off.

A. Mesh

B. Star

C. None

D. Bus

89: What does an assigned IP addres 169.254.0.12 indicate?

A. The computer is configured for DHCP and cannot connect to the DHCP server

B. The computer is configured with a static IP address.

C. The computer is being used as an Internet shared connection host.

D. The computer has been configurd to work with a Linux system.

E. The computer is using a dial-up modem.

90: In IPv4 addresses, how many addresses are available?

A. 2^16

B. None of these

C. 2^32

D. 2^64

91: What or who is responsible for top-level country domains such as uk, ca, and jp?

A. The businesses of the respective country.

B. The local government's network administration.

C. Top-level domain (TLD) servers.

D. Country-wide domain (CWD) servers.

92: What is the maximum speed of a wireless G network?

A. 11Mbps

B. 54Mbps

C. 300Mbps

D. 150Mbps

93: Which topology uses terminators?

A. Star

B. BUS

C. Ring

D. None of these

94: Which protocol is used to send a destination network unknown message back to originating hosts?

A. TCP

B. BootP

C. ICMP

D. ARP

95: Variability of packet delays within the same packet stream is called

A. Jitter

B. Delayed packet

C. None of these

D. Delayed buffer

96: In what Operating System(s) are sockets file descriptors?

A. Unix and Mac OSX

B. Windows

C. Unix

D. Mac OSX

97: Is a DNS required for hosting a website?

A. No because DNS is a luxury that only large businesses can afford.

B. Yes, since no one could ever visit your website without a DNS.

C. No, but that means there will be no translation from hostname to IP address.

98: What is the primary Layer 3 protocol in the TCP/IP suite?

A. UDP

B. IP

C. TCP

D. ARP

99: You are a Network Administrator for the ACME company; one of your webservers had a hardware issue, so you moved the IP address (192.168.1.99) to another webserver. Users from other networks are reporting that they still are not able to access the website. You are able to access the website locally; What is the best answer that will fix the issue.

A. Clear the ARP Cache on the router

B. Update NAT

C. Start the Web Service application

D. Add a firewall rule

100: What is the purpose of the ARP (Address Resolution Protocol)?

A. Resolves a MAC address to a DNS name

B. Resolves a MAC address to an IP address

C. Resolves an IP address to a MAC address

D. Resolves a DNS name to a MAC address