The Transport Layer

Which one of the following is not a responsibility of the Transport Layer ?

• Tracking the conversation

• Segmentation

• Identifying the application

• directing the pack to the correct network

What information in the TCP header is used to reassemble the segments at the receiving end ?

• Header length

• Control bits

• Sequence number

• Windows size

What information in the TCP header is used to check for errors in the segment header & data ?

• Sequence number

• Windows size

• Header length

• Checksum

Which protocol does not resend lost segments ?

• TCP

• UDP

• HTTP

• FTP

What do you understand by the term Socket ?

• It is an IP address

• It is a Port number

• IP and Port number

• MAC address

Which well known port used by the SSH protocol ?

• 21

• 22

• 23

• 25

How many messages are exchanged during the TCP connection establishment process ?

• 0

• 1

• 2

• 3

A packet filtering firewall operates at

• Layer 2 & 3

• Layer 3 & 4

• Layer 4 & 5

• Layer 5 & 6

The type of firewall that maintains a state table to track the TCP connection state is called a

• Packet filtering firewall

• Application firewall

• Statefull firewall

• NAT firewall

A Demilitarized Zone in a network holds the

• Web servers

• Application servers

• Database servers

• LDAP servers