Computer Networking Quiz (or) Computer Networking MCQ (Multiple Choice Questions)

1 .

You need to subnet a network into 5 subnets, each with at least 16 hosts. Which classful subnet mask would you use?

A)

255.255.255.192

B)

255.255.255.240

C)

255.255.255.224

D)

255.255.255.248

Correct Answer : Option (C) : 255.255.255.224

Explanation : You need 5 subnets, each with at least 16 hosts. The mask 255.255.255.240 provides 16 subnets with 14 hosts which is less than 15, so this will not work. The mask 255.255.255.224 provides 8 subnets, each with 30 hosts so this may work. The mask 255.255.255.192 provides 4 subnets, each with 60 hosts so this may work. Comparing both the possible masks, 255.255.255.224 provides the best answer.

2 .

You have a network that needs 29 subnets while maximizing the number of host addresses available on each subnet. How many bits must you borrow from the host field to provide the correct subnet mask?

A)

2

B)

3

C)

4

D)

5

Correct Answer : Option (D) : 5

Explanation : A 240 mask is 4 subnet bits and provides 16 subnets, each with 14 hosts. We need more subnets, so let’s add subnet bits. One more subnet bit would be a 248 mask. This provides 5 subnet bits (32 subnets) with 3 host bits (6 hosts per subnet).

3 .

What is the subnet id of a host with an IP address 172.16.66.0/21?

A)

172.16.64.0

B)

172.16.48.0

C)

172.16.36.0

D)

172.16.0.0

Correct Answer : Option (A) : 172.16.64.0

Explanation : A /21 is 255.255.248.0, which means we have a block size of 8 in the third octet, so we just count by 8 until we reach 66. The subnet in this question is 64.0. The next subnet is 72.0, so the broadcast address of the 64 subnet is 71.255.

4 .

The network address of 172.16.0.0/19 provides how many subnets and hosts?

A)

7 subnets, 30 hosts each

B)

8 subnets, 8,190 hosts each

C)

7 subnets, 2,046 hosts each

D)

8 subnets, 2,046 hosts each

Correct Answer : Option (B) : 8 subnets, 8,190 hosts each

Explanation : A CIDR address of /19 is 255.255.224.0. This is a Class B address, so that is only 3 subnet bits, but it provides 13 host bits, or 8 subnets, each with 8,190 hosts.

5 .

Which type of Ethernet framing is used for TCP/IP and DEC net?

A)

Ethernet SNAP

B)

Ethernet II

C)

Ethernet 802.2

D)

Ethernet 802.3

Correct Answer : Option (B) : Ethernet II

Explanation : The Ethernet 802.3 framing is used for NetWare versions 2 to 3.11, and the Ethernet 802.2 framing is used for NetWare versions 3.12 and later plus OSI routing, Ethernet II is used with TCP/IP and DEC net, and Ethernet SNAP is used with TCP/IP and AppleTalk. The type field in Ethernet 802.2 frame is replaced by a length field in Ethernet 802.3.

6 .

Consider a situation in which you are a system administrator on a NetWare network, you are running NetWare 4.11 and you cannot communicate with your router. What is the likely problem?

A)

Cisco routers only work with NetWare 3.11

B)

NetWare 4.11 defaults to 802.3 encapsulation

C)

NetWare 4.11 defaults to 802.2 encapsulation

D)

NetWare 3.11 defaults to 802.2 encapsulation

Correct Answer : Option (C) : NetWare 4.11 defaults to 802.2 encapsulation

Explanation : The default encapsulation on Cisco routers is Novell Ethernet_802.3 and NetWare 3.12and later defaults to 802.2 encapsulation, 3.11 and earlier defaults to 802.3.

7 .

Which NetWare protocol works on layer 3–network layer—of the OSI model?

A)

IPX

B)

SPX

C)

NCP

D)

NetBIOS

Correct Answer : Option (A) : IPX

Explanation : IPX (Internetwork Packet Exchange) is the NetWare network layer 3 protocol used for transferring information on LANs that use Novell’s NetWare.

8 .

Which NetWare protocol provides link-state routing?

A)

RIP

B)

SAP

C)

NCP

D)

NLSP

Correct Answer : Option (D) : NLSP

Explanation : NetWare Link Services Protocol (NLSP) provides link-state routing. SAP (Service Advertisement Protocol) advertises network services. NCP (NetWare Core Protocol) provides client-to-server connections and applications. RIP is a distance vector routing protocol. NLSP was developed by Novell to replace RIP routing protocols.

9 .

The "IPX delay number" command will allow an administrator to change the default settings. What are the default settings?

A)

For LAN interfaces, six ticks; for WAN interfaces, one tick

B)

For LAN interfaces, zero ticks; for WAN interfaces, five ticks

C)

For LAN interfaces, one tick; for WAN interfaces, six ticks

D)

For LAN interfaces, five ticks; for WAN interfaces, zero Ticks

Correct Answer : Option (C) : For LAN interfaces, one tick; for WAN interfaces, six ticks

Explanation : Tick is basically the update rate of clients in the network. The IPX delay number will give the ticks at a certain time. The default ticks are–for LAN interfaces, one tick, and for WAN interfaces, six ticks.

10 .

What does the "IPX maximum-paths 2" command accomplish?

A)

It sets up routing to go to network 2

B)

It is the default for Cisco IPX load sharing

C)

It enables load sharing on 2 paths if the paths are unequal metric paths

D)

It enables load sharing on 2 paths if the paths are equal metric paths

Correct Answer : Option (D) : It enables load sharing on 2 paths if the paths are equal metric paths

Explanation : It enables load sharing on 2 paths if the paths are equal metric paths. The default is 1 path and the maximum is 512 paths. The value must always be greater than 1 and must be a natural number.