50 Computer Networks MCQs with Answers

Question 41

A T-switch is used to

• Control how messages are passed between computers
• Echo every character that is received
• Transmit characters one at a time
• Rearrange the connections between computing equipments

Question 42

Match the security protocols with the layers they are used in and choose the correct code - 


[Tex]\begin{array}{ll} List-1 & List-2\\ A. TLS & 1. Physical Layer\\ B. WEP & 2. Link Layer\\ C. PGP & 3. Network Layer\\ D. IPsec & 4. Transport Layer\\ & 5. Application Layer\\ \end{array}[/Tex]




Codes- 
[Tex] \begin{array}{lllll} & A & B & C & D\\ (a) & 2 & 5 & 1 & 3\\ (b) & 5 & 2 & 3 & 2\\ (c) & 4 & 2 & 5 & 3\\ (d) & 5 & 2 & 4 & 3\\ \end{array}[/Tex]

• (d)
  

• (c)
  

• (b)
  

• (a)
  

Question 43

Range of IP Address from 224.0.0.0 to 239.255.255.255 are

• Reserved for loopback
• Reserved for broadcast
• Used for multicast packets
• Reserved for future addressing

Question 44

The network 198.78.41.0 is a

• Class A network
• Class B network
• Class C network
• Class D network

Question 45

What percentage(%) of the IPv4, IP address space do all class C addresses consume?

• 12.5%
• 25%
• 37.5%
• 50%

Question 46

The default subnet mask for a class B network can be

• 255.255.255.0
• 255.0.0.0
• 255.255.192.0
• 255.255.0.0

Question 47

Consider the following routing table at an IP router 

[caption width="800"] [/caption]

For each IP address in Group-I identify the correct choice of the next hop from Group-II using the entries from the routing table above.

   List-I               List-II
A. 128.96.171.92     1. Interface 0
B. 128.96.167.151    2. Interface 1
C. 128.96.163.121    3. R2
D. 128.96.165.121    4. R3
                     5. R4
Codes:
     A B C D
(a)  1 3 5 4
(b)  1 4 2 5
(c)  2 3 4 5
(d)  2 3 5 4

• a

• b

• c

• d

Question 48

In class B if subnet mask is 255.192.0.0 Total Number of networks than can be joined

• 32
• 64
• 16
• None of the Above

Question 49

If block contains 32 IP address which of the following is first address of the block ?

• 10.0.0.5

• 10.0.0.16

• 10.0.0.68

• 10.0.0.160

Question 50

Which of the following IP address can be used in WAN?

• 10.0.0.1
• 172.16.0.10
• 15.1.5.6
• None