Networking – Section 6

36. Alice is setting up a small network in her home so that she can study for her MCSE exams. She doesn’t have a lot of money to spend on hardware, so she wants to use a network topology that requires the least amount of hardware possible. Which topology should she select?

A. Star
B. Right
C. Token-Ring
D. Ethernet
E. Bus

Correct Answer: E. Bus

37. The CCITT Recommendation X.25 specifies three layers of communications:

A. application, presentation and session
B. Session, transport and network
C. physical datalink and network
D. datalink, network and transport

Correct Answer: C. physical datalink and network

38. Which of the following technique is used for allocating capacity on a satellite channel using fixed-assignment FDM?

A. Amplitude modulation
B. Frequency-division multiple access
C. Frequency modulation
D. Frequency-shift keying
E. None of the above

Correct Answer: B. Frequency-division multiple access

39. The amount of uncertainty in a system of symbol is called

A. Bandwidth
B. Entropy
C. loss
D. Quantum
E. None of the above

Correct Answer: B. Entropy

40. Which of the following allows a simple email service and is responsible for moving messages from one mail server to another?

A. IMAP
B. DHCP
C. SMTP
D. FTP
E. POP3

Correct Answer: C. SMTP

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