a. What is availability?

5a1.) ________ is the percentage of time that a network is available to users.

a. Availability

b. Downtime

c. QoS

d. None of the above

5a2.) Which of the following usually has higher availability?

a. Data networks

b. Public Switched Telephone Network

c. Both of the above usually have equal availability.

d. Neither A nor B

b. When should you measure error rates? Why?

5b.) Error rates can soar when the network traffic level is at a(n) ________.

a. High level

b. Fluctuating level

c. Unregulated

d. None of the above

c. What is latency?

5c.) When a packet travels through a network, the time it takes to get from the sender to the receiver is called ________.

a. Latency

b. Milliseconds

c. Jitter

d. Throughput

d. In what units is latency measured?

5d.) Latency is usually measured in ________.

a. Bits per second (bps)

b. Milliseconds (ms)

c. Minutes of downtime

d. None of the above

e. What is jitter?

5e1.) Variability in delay is called ________.

a. Jitter

b. Variance

c. An QoS failure

d. Latency

5e2.) Jitter is a problem for ________.

a. Voice over I P (V o I P)

b. Streaming media

c. Both A and B

d. Neither A nor B

5e3.) Jitter is a problem for ________.

a. Downloading a file attached to an e-mail

b. E-mail

c. Both A and B

d. Neither A nor B

f. Why may adding applications that cannot tolerate latency and jitter be expensive?

5f.) Adding applications that cannot tolerate jitter may require ________.

a. Many switch upgrades

b. More careful switch management

c. Changing security

d. All of the above