Application Layer

Question 11

A web client sends a request to a web server. The web server transmits a program to that client ans is executed at client. It creates a web document. What are such web documents called?

• Active
• Static
• Dynamic
• Passive

Question 12

Which of the following protocols is an application layer protocol that establishes, manages and terminates multimedia sessions ?

• Session Maintenance Protocol
• Real - time Streaming Protocol
• Real - time Transport Control Protocol
• Session Initiation Protocol

Question 13

What is the size of the ‘total length’ field in IPv₄ datagram?

• 4 bit
• 8 bit
• 16 bit
• 32 bit

Question 14

A packet filtering firewall can

• deny certain users from accessing a service
• block worms and viruses from entering the network
• disallow some files from being accessed through FTP
• block some hosts from accessing the network

Question 15

Consider the set of activities related to e-mail A : Send an e-mail from a mail client to mail server B : Download e-mail headers from mail box and retrieve mails from server to a cache C : Checking e-mail through a web browser The application level protocol used for each activity in the same sequence is

• SMTP, HTTPS, IMAP
• SMTP, POP, IMAP
• SMTP, IMAP, HTTPS
• SMTP, IMAP, POP

Question 16

What is one advantage of setting up a DMZ(Demilitarized Zone) with two firewalls?

• You can control where traffic goes in the three networks

• You can do stateful packet filtering

• You can do load balancing

• Improve network performance

Question 17

The protocol data unit (PDU) for the application layer in the Internet stack is

• Segment
• Datagram
• Message
• Frame

Question 18

What is the maximum size of data that the application layer can pass on to the TCP layer below?

• A
• B
• C
• D