61.
Encapsulation provides what type of action?
- A.Ensures perfect forward secrecy with IPsec
- B.Places one type of packet inside another
- C.Provides for data integrity
- D.Provides encryption and VPNs
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| Encapsulation is a method of surrounding one packet with another packet. This technique completely encases the packet data. The outer packet does not have to provide encryption services. The other options are distractors. |
62.
The OSI model features how many layers?
- A.Six
- B.Seven
- C.Four
- D.Five
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| The OSI model is a seven-layer model, with each layer responding to the layer directly above and directly below it. The TCP/IP model is a four-layer model. The other options are distractors. |
63.
Which of the following offers the highest bandwidth and fiber-optic transmissions?
- A.Single-mode
- B.Dual-mode
- C.Multimode
- D.Plastic optical fiber
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Single-mode optical cable has the smallest diameter glass core, which decreases the number of light refl ections. This allows for greater transmission distances of up to 80 km. |
64.
The address space for IPv6 is how many bits?
- A.144 bits
- B.132 bits
- C.32 bits
- D.128 bits
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| The address space for IPv6 is 128 bits. The address space for IPv4 is 32 bits. The other options are distractors. |
65.
Switches operate at layer 2 on the OSI model and route what type of information?
- A.HMAC addresses
- B.IP addresses
- C.MAC addresses
- D.Secure packets
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Switches operate at layer 2 of the OSI model and route physical addresses, referred to as media access control addresses, which are unique to each node on a network. The other options are distractors. |
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