更多"Why is it that the global telegraph"的相关试题:
[单项选择]Why is it that the global telegraph network was truly revolutionary
A. It has changed the way we do business and communicate.
B. It makes virtual communities possible.
C. It makes real-time global news service available.
D. It makes world peace.
[单项选择]Which command should be used to capture network traffic between the localhost and a host named ‘webserver’?（）
A. tcpdump webserver
B. tcpdump host webserver
C. tcpdump -hostname webserver
D. tcpdump -print -h webserver
[多项选择]Which three SONET network elements are used for troubleshooting?（）
A. line
B. path
C. circuit
D. section
E. segment
[单项选择]Why would a network administrator configure port security on a switch（）。
A. to prevent unauthorized Telnet access to a switch port
B. to limit the number of Layer 2 broadcasts on a particular switch port
C. to prevent unauthorized hosts from accessing the LAN
D. to protect the IP and MAC address of the switch and associated ports
E. to block unauthorized access to the switch management interfaces over common TCP ports
[单项选择]Why was the plant hemp essential to world -wide trade in the past
[单项选择]Why Bill Gates' kids are going to get different treatment
A. Bill Gates is very great in computer science.
B. Bill Gates is famous.
C. Bill Gates suppresses "need-blind" policy.
D. Bill Gates has great ability to pay.
[单项选择]In a switched LAN network, what is the Spanning-Tree algorithm used for?（）
A. It is used to provide a mechanism for routing updates in switched environments.
B. It is used to prevent routing loops in networks with redundant routes.
C. It is used to prevent switching loops in networks with redundant switched routes.
D. It is used to manage, the addition, deletion, and naming of VLANs across multiple switches.
E. It is used to segment a network into multiple collision domains.
F. None of the above.
G. All of the above are functions of STP.
[单项选择]Why is QoS important in a converged network?（）
A. Because voice data packets must follow a single dedicated path through the network
B. Because voice data packets should arrive quickly and sequentially, and with no lost data
C. Because lost voice-data packets must be retransmitted
D. Because data does not need to arrive intact, so data transfer rates can be variable
[单项选择]I don't understand why such a good man has been treated with such scorn and ________.
A. difference
B. inference
C. indifference
D. reference
[单项选择]I don't understand why such a good man bas been treated with such scorn and ______.
A. difference
B. indifference
C. inference
D. reference
[单项选择]-- Why are you staring -- I've never seen_______tree before.
A. kind of
B. that kind of
C. such kind
D. such
[多项选择]Why would the network manager elect to implement a configuration that includes GRE tunnels for a eleworker deployment?（）
A. GRE can use transport mode and save up to twenty bytes per packet.
B. The corporate network includes many discontinuous blocks of IP networks and requires split tunneling.
C. The corporation's primary application is based on IP multicast.
D. Without GRE, there is no means to detect a head-end failure.
E. GRE would enable path MTU discovery.
[单项选择]Why would a network administrator configure port security on a switch?（）
A. to prevent unauthorized Telnet access to a switch port
B. to limit the number of Layer 2 broadcasts on a particular switch port
C. to prevent unauthorized hosts from accessing the LAN
D. to protect the IP and MAC address of the switch and associated ports
E. to block unauthorized access to the switch management interfaces over common TCP ports
[单项选择]The telegraph opened up the possibility of establishing almost______ communication and thereby offered many practical advantages to people in all walks of life.
A. distant
B. instantaneous
C. immediate
D. transient
[单项选择]All of the following facts about the telegraph and the Internet are true EXCEPT the fact that ______.
A. both develop from the most advanced science of their time
B. they are operated similarly in technical terms
C. both help to change the way we do business and communicate
D. both facilitate the communication between cultures and ethnic groups
