ccna 2.7

CCNA Discovery 2 Module 7 Exam Answers Version 4.0
1. • The OSI network layer is comparable to the Internet layer of the TCP/IP model.
• The TCP/IP model is based on four layers and the OSI model is based on seven layers.
2.• availability
• scalability
3. • It utilizes TCP port 110.
• SMTP is used to send the e-mail message to the mail servers.
4. • Host2 sends a SYN-ACK message to Host1.
5. • Redundant hardware provides enhanced reliability.
• Fault tolerance is a measure of reliability.
• The longer the MTBF, the greater the reliability.
6. • The protocol interpreter is responsible for the data transfer function.
• In passive data connections, the FTP client initiates the transfer of data.
7. • It enables the synchronization of port numbers between source and destination hosts.
8. • It supports authentication.
• It encrypts packets with SSL.
• It requires additional server processing time.
9. • reverse lookup
10. • dynamic
11. • The command ping fileserv will use IP address 172.16.5.10.
12. • mapping name-to-IP addresses for internal hosts
• forwarding name resolution requests to a caching-only server
13. • low overhead
• no flow control
• no error-recovery function
14. • FTP
• HTTP
• SMTP
15. • HTTP – 80
• SMTP – 25
16. • source IP address and port with a destination IP address and port
17. • SMTP
18. • Source – 192.168.1.17:80 ; Destination – 192.168.2.39:1045
19. • caching-only
20. • The server will determine the appropriate service from the destination port field.
21. • IP address
• MAC address