66.
Which of the following protocols is referred to as connection oriented?
- A.TCP
- B.UDP
- C.SYN
- D.NAT
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| TCP is a connection-oriented protocol because it establishes, through a three-way handshake, a communication path between two entities. A TCP connection allows for the receiving entity to request that a packet be resent in the event of an error condition. The other options are distractors. |
67.
The most redundancy and connection speed is offered by which of the following network
typology?
- A.Ring
- B.Tree
- C.Mesh
- D.Star
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Mesh topologies are used where speed and redundancy are required, such as with faulttolerant devices, load distribution server clustering, and storage area networks (SANs). The other options are distractors. |
68.
In a private enterprise environment, which of the following is most secure?
- A.Decentralized key management
- B.Centralized key management
- C.Individual key management
- D.Distributed key management
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Centralized key management is more secure, or at least more desirable, in a private enterprise environment. In a public or individual environment, decentralized key management is more secure. Individual key management and distributed key management are nonstandard terms that could be used to refer to decentralized key management. |
69.
Which of the following media access methods features a node broadcasting a tone prior to
transmitting?
- A.CSMA/CT
- B.CSMA/CD
- C.CSMA/CA
- D.CSMA/CS
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Carrier Sense Multiple Access/Collision Avoidance describes a technique used to announce that a device is wishing to transmit on the media. The device will transmit or broadcast a tone prior to transmission. The tone is referred to as a jamming signal and will be heard by all other devices connected to the media. |
70.
Which of the following best describes converged network communications?
- A.The combination of two types of media such as copper and fiber-optic
- B.The use of Ethernet when communicating on a wireless network
- C.Transmission of voice and media files over a network
- D.The combination of SMS and chat capability on business networks
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The convergence of network communications involves the transmission of multimedia and data on the same network. |
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