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| 1 | |
HDLC is an acronym for _______. |
| | A) | High-Duplex Line Communication |
| | B) | Half-Duplex Link Combination |
| | C) | High-Level Data Link Control |
| | D) | Host Double-Level Circuit |
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| 2 | |
The shortest frame in HDLC protocol is usually the _______ frame. |
| | A) | information |
| | B) | management |
| | C) | supervisory |
| | D) | None of the choices are correct |
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| 3 | |
The address field of a frame in HDLC protocol contains the address of the _______ station. |
| | A) | primary |
| | B) | secondary |
| | C) | tertiary |
| | D) | primary or secondary |
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| 4 | |
The HDLC _______ field defines the beginning and end of a frame. |
| | A) | control |
| | B) | flag |
| | C) | FCS |
| | D) | None of the choices are correct |
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| 5 | |
What is present in all HDLC control fields? |
| | A) | N(R) |
| | B) | N(S) |
| | C) | Code bits |
| | D) | P/F bit |
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| 6 | |
According to the PPP transition-phase diagram, options are negotiated in the _______ state. |
| | A) | networking |
| | B) | terminating |
| | C) | establishing |
| | D) | authenticating |
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| 7 | |
According to the PPP transition-phase diagram, verification of user identification occurs in the _______ state. |
| | A) | networking |
| | B) | terminating |
| | C) | establishing |
| | D) | authenticating |
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| 8 | |
In the PPP frame, the _______ field defines the contents of the data field. |
| | A) | FCS |
| | B) | flag |
| | C) | control |
| | D) | protocol |
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| 9 | |
In the PPP frame, the _______ field is similar to that of the U-frame in HDLC. |
| | A) | flag |
| | B) | protocol |
| | C) | FCS |
| | D) | control |
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| 10 | |
In the PPP frame, the _______ field has a value of 11111111 to indicate the broadcast address of HDLC. |
| | A) | protocol |
| | B) | address |
| | C) | control |
| | D) | FCS |
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| 11 | |
In PPP, what is the purpose of LCP packets? |
| | A) | Configuration |
| | B) | Termination |
| | C) | Option negotiation |
| | D) | All of the choices are correct |
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| 12 | |
In the PPP frame, the _______ field is for error control. |
| | A) | FCS |
| | B) | flag |
| | C) | control |
| | D) | protocol |
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| 13 | |
For CHAP authentication, the user takes the system’s _______ and its own _______ to create a result that is then sent to the system. |
| | A) | authentication identification; password |
| | B) | password; authentication identification |
| | C) | challenge value; password |
| | D) | password; challenge value |
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| 14 | |
In byte stuffing, we need sometimes to add a (an) ___________ in the payload. |
| | A) | flag byte |
| | B) | ESC byte |
| | C) | null byte |
| | D) | None of the choices are correct |
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| 15 | |
In bit stuffing, we sometimes need to add an extra ___________ bit in the payload. |
| | A) | 0’s |
| | B) | 1’s |
| | C) | 0’s or 1’s |
| | D) | None of the choices are correct |
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| 16 | |
HDLC is a ________ oriented protocol |
| | A) | byte |
| | B) | bit |
| | C) | byte or bit |
| | D) | None of the choices are correct |
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| 17 | |
PPP is a ________ oriented protocol |
| | A) | byte |
| | B) | bit |
| | C) | byte or bit |
| | D) | None of the choices are correct |
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| 18 | |
In PPP, the address field defines ___________ of the packet. |
| | A) | the sender |
| | B) | the receiver |
| | C) | either the sender or the receiver |
| | D) | None of the choices are correct |
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| 19 | |
In PPP, the ___________ field defines the type of payload encapsulated in the frame. |
| | A) | address |
| | B) | control |
| | C) | protocol |
| | D) | None of the choices are correct |
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| 20 | |
In PPP, the CHAP protocol uses ____________ steps to authenticate the parties in communication. |
| | A) | one |
| | B) | two |
| | C) | three |
| | D) | None of the choices are correct |
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