Quiz

Question 1

Which of the following is a well-known port number, as defined by IANA?

1. 1010

2. 2001

3. 4023

4. 65000

Solution

1. 1010

Question 2

According to IANA specifications, what range of port numbers should hosts select from when randomly selecting a source Layer 4 port number?

1. Well-known

2. Registered

3. Ephemeral

4. Reserved

Solution

1. Ephemeral

Question 3

Which of the following are features of TCP but not UDP? (select three)

1. Layer 4 addressing

2. Error recovery

3. Session multiplexing

4. Flow control

5. Sequencing

Solution

1. Error recovery

2. Flow control

3. Sequencing

Question 4

Which of the following Application Layer protocols use TCP to provide reliable communications? (select three)

1. SMTP

2. SNMP

3. HTTPS

4. DHCP

5. Syslog

6. SSH

Solution

1. SMTP

2. HTTPS

3. SSH

Question 5

PC1 and SRV1 have an active TCP connection. SRV1 receives a TCP segment from PC1 with a sequence number of 27. When SRV1 acknowledges the segment, what will the value of the Acknowledgment field in the TCP header be? Assume a TCP window size of 1.

1. 26

2. 27

3. 28

Solution

1. 28