Which one of the following protocols CANNOT be used for full duplex Wide Area Network (WAN)
communications?
A.
Synchronous Data Link Control (SDLC)
10 Mbps
B.
Serial Line Internet Protocol (SLIP)
100 Mbps
C.
Point-to-Point Protocol (PPP)
“PPP is a full-duplex protocol that provides bi-directional links over synchronous, asynchronous,
ISDN, frame relay and SONET connections.” Pg. 472 Shon Harris CISSP All-In-One Certification Exam
Guide. PPP is full-duplex. Not
1000 Mbps
D.
High-Level Data Link Control (HDLC)
“HDLC is an extension of SDLC, which is mainly used in SNA environments. HDLC provides high
throughput because it supports full-duplex transmissions and is used in point-to-point and
multipoint connections.” Pg 456 Shon Harris CISSP All-In-One Certification Exam Guide. PPP is fullduplex.
QUESTION 826
Fast ethernet operates at which of the following?
All of the above
C.
Point-to-Point Protocol (PPP)
“PPP is a full-duplex protocol that provides bi-directional links over synchronous, asynchronous,
ISDN, frame relay and SONET connections.” Pg. 472 Shon Harris CISSP All-In-One Certification Exam
Guide. PPP is full-duplex. Not
1000 Mbps
D.
High-Level Data Link Control (HDLC)
“HDLC is an extension of SDLC, which is mainly used in SNA environments. HDLC provides high
throughput because it supports full-duplex transmissions and is used in point-to-point and
multipoint connections.” Pg 456 Shon Harris CISSP All-In-One Certification Exam Guide. PPP is fullduplex.
QUESTION 826
Fast ethernet operates at which of the following?
All of the above
A.
Synchronous Data Link Control (SDLC)
10 Mbps
B.
Serial Line Internet Protocol (SLIP)
100 Mbps
C.
Point-to-Point Protocol (PPP)
“PPP is a full-duplex protocol that provides bi-directional links over synchronous, asynchronous,
ISDN, frame relay and SONET connections.” Pg. 472 Shon Harris CISSP All-In-One Certification Exam
Guide. PPP is full-duplex. Not
1000 Mbps
D.
High-Level Data Link Control (HDLC)
“HDLC is an extension of SDLC, which is mainly used in SNA environments. HDLC provides high
throughput because it supports full-duplex transmissions and is used in point-to-point and
multipoint connections.” Pg 456 Shon Harris CISSP All-In-One Certification Exam Guide. PPP is fullduplex.
QUESTION 826
Fast ethernet operates at which of the following?
All of the above
Explanation:
By exclusion SLIP is the correct answer. Note: Serial Line Internet Protocol (SLIP) is an older
technology developed to support TCP/IP communications over asynchronous serial connections,
such as serial cables or modem dial-up. Pg 96. Tittel: CISSP Study Guide. SLIP is serial protocol
opposed to WAN protocol. Not SDLC: SDLC is full duplex. “SDLC was developed to enable
mainframes to communicate with remote locations.” Pg 456 Shon Harris CISSP Certification Exam
Guide. This is a WAN protocol. Not“Fast Ethernet 100Mbps – IEE 802.3u” pg 810 Shon Harris CISSP All-In-One Exam Guide