TCP/IP Layers UGC

Question 1

An internet service provider (ISP) has following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20 . The ISP want to give half of this chunk of addresses to organization A and a quarter to Organization B while retaining the remaining with itself. Which of the following is a valid allocation of addresses to A and B ?

• 245.248.132.0/22 and 245.248.132.0/21
• 245.248.136.0/21 and 245.248.128.0/22
• 245.248.136.0/24 and 245.248.132.0/21
• 245.248.128.0/21 and 245.248.128.0/22

Question 2

​Identify the correct sequence in which the following packets are transmitted on the network by a host when a browser requests a web page from a remote server, assuming that the host has been restarted.

• HTTP GET request, DNS query, TCP SYN
• DNS query, TCP SYN, HTTP GET request
• TCP SYN, DNS query, HTTP GET request
• DNS query, HTTP Get request, TCP SYN

Question 3

In the TCP/IP model, encryption and decryption are functions of ____ layer.

• Datalink layer
• Network layer
• Transport layer
• Application layer