Computer Networks Interview Subcategories

Experienced	Freshers
Computer Networks Interview	Campus Interviews

Which of the following demerits does Fragmentation have?

A. Complicates routers
B. Open to dos attack
C. Overlapping of fragments
D. All of the mentioned

Explanation: Fragmentation makes the implementation of the IP protocol complex and can also be exploited by attackers to create a DOS attack such as a teardrop attack. Fragmentation won’t be required if the transport layer protocols perform wise segmentation.

In classless addressing, there are no classes but addresses are still granted in ______

A. Ips
B. Blocks
C. Codes
D. Sizes

Explanation: In classless addressing, there are no classes but addresses are still granted in blocks. The total number of addresses in a block of classless IP addresses = 2(32 – CIDR_value).

In IPv4 Addresses, classful addressing is replaced with ________

A. ClaSSLess addressing
B. Classful addressing
C. Classful advertising
D. ClaSSLess advertising

Explanation: Classful addressing is replaced with classless addressing as a large ratio of the available addresses in a class in calssful addressing is wasted. In classless addressing, one can reserve the number of IP addresses required by modifying the CIDR value and make sure that not many addresses are wasted.

First address in a block is used as network address that represents the ________

A. Class network
B. Entity
C. Organization
D. Codes

Explanation: First address in a block is used as network address that represents the organization. The network address can be found by AND’ing any address in the block by the default mask. The last address in a block represents the broadcast address.

In classful addressing, a large part of available addresses are ________

A. Organized
B. Blocked
C. Wasted
D. Communicated

Explanation: In classful addressing, a large part of available addresses are wasted. Thus to solve this classful addressing is replaced with classless addressing where one can reserve the number of IP addresses required by modifying the CIDR value and make sure that not many addresses are wasted.

Network addresses are a very important concept of ________

A. Routing
B. Mask
C. Ip addressing
D. ClaSSLess addressing

Explanation: Network addresses are a very important concept of IP addressing. The first address in a block is used as network address that represents the organization. The network address can be found by AND’ing any address in the block or class by the default mask.

Which of this is not a class of IP address?

A. Class e
B. Class c
C. Class d
D. Class f

Explanation: Class F is not a class of IP addressing. There are only five classes of IP addresses: Class A (0.0.0.0 to 127.255.255.255), Class B (128.0.0.0 to 191.255.255.255), Class C (192.0.0.0 to 223.255.255.255), Class D (224.0.0.0 to 239.255.255.255), and Class E (240.0.0.0 to 255.255.255.255).