Review Questions
The answers to these review questions appear in Appendix A, “Answers to Review Questions.”
Which layer of the OSI reference model contains the MAC and LLC sublayers?
Network layer
Transport layer
Physical layer
Data link layer
Which approach to bandwidth usage consumes all the available frequencies on a medium to transmit data?
Broadband
Baseband
Time-division multiplexing
Simplex
Windowing is provided at what layer of the OSI reference model?
Data link layer
Network layer
Transport layer
Physical layer
IP addresses reside at which layer of the OSI reference model?
Network layer
Session layer
Data link layer
Transport layer
Which of the following is a connectionless transport layer protocol?
IP
TCP
UDP
H.323
Identify the four layers of the TCP/IP stack. (Choose four.)
Session layer
Transport layer
Internet layer
Data link layer
Network layer
Application layer
Network interface layer
What is the range of well-known TCP and UDP ports?
Below 2048
Below 1024
16,384–32,768
Above 8192
Which protocol supports a secure connection to a remote host via terminal emulation software?
Telnet
SSH
FTP
SFTP
Identify the well-known UDP port number for NTP.
53
69
123
143
Identify three e-mail protocols. (Choose three.)
SNMP
SMTP
POP3
IMAP4