Chapter 7 - WAN Transport Methods
TRUE/FALSE
1. X.25 is connection-oriented.
ANS: T PTS: 1 REF: 306
2. X.25 networks are designed to release unused bandwidth when nodes are not communicating.
ANS: T PTS: 1 REF: 312
3. In frame relay communications, the virtual connections are a physical connection.
ANS: F PTS: 1 REF: 314
4. The BRI ISDN supports faster data rates than the PRI ISDN.
ANS: F PTS: 1 REF: 323
5. LAPF is also referred to as the Q.921 protocol.
ANS: F PTS: 1 REF: 325
6. SMDS is a connectionless transport system.
ANS: T PTS: 1 REF: 327
7. An advantage of RADSL is that the line length can be greater in situations where not all of the
bandwidth is used, so it can accommodate customers who are more that 5.5 kilometers from the telco.
ANS: T PTS: 1 REF: 334
8. SONET is proprietary, so point-to-point network equipment can get expensive.
ANS: F PTS: 1 REF: 337
9. When you use a modem to access the Internet, you most likely use PPP.
ANS: T PTS: 1 REF: 342
MODIFIED TRUE/FALSE
1. X.25 includes the LAPD protocol. _________________________
ANS: F, LAPB
PTS: 1 REF: 307
2. The advantage of a(n) smart card is that is can be equipped with a digital signature, access keys,
password access, and PIN to control logon access and access to files and data.
_________________________
, ANS: T PTS: 1 REF: 309
3. The figure above is an example of a(n) X.25 frame. _________________________
ANS: T PTS: 1 REF: 311
4. N-ISDN is the most commonly installed version of ISDN, and currently has a practical data
transmission rate that is equal to a T-1. _________________________
ANS: T PTS: 1 REF: 347
5. The figure above shows a(n) ISDN LAPD frame. _________________________
ANS: T PTS: 1 REF: 326
6. The SONET interface is called a DQDB, and consists of two shared fiber-optic media.
_________________________
ANS: F, SMDS
PTS: 1 REF: 328
7. DSL comes in many versions and is gathering interest among network administrators because it can
turn existing twisted-pair telephone wire into a high-speed WAN for communications up to 55 Mbps
(downstream). _________________________
ANS: T PTS: 1 REF: 348
8. SONET travels in a(n) bus topology. _________________________
ANS: F, ring
PTS: 1 REF: 339
9. High-speed Fast Ethernet technologies are beginning to challenge SONET and frame relay for
dominance in Ethernet-based metropolitan area networks. _________________________
TRUE/FALSE
1. X.25 is connection-oriented.
ANS: T PTS: 1 REF: 306
2. X.25 networks are designed to release unused bandwidth when nodes are not communicating.
ANS: T PTS: 1 REF: 312
3. In frame relay communications, the virtual connections are a physical connection.
ANS: F PTS: 1 REF: 314
4. The BRI ISDN supports faster data rates than the PRI ISDN.
ANS: F PTS: 1 REF: 323
5. LAPF is also referred to as the Q.921 protocol.
ANS: F PTS: 1 REF: 325
6. SMDS is a connectionless transport system.
ANS: T PTS: 1 REF: 327
7. An advantage of RADSL is that the line length can be greater in situations where not all of the
bandwidth is used, so it can accommodate customers who are more that 5.5 kilometers from the telco.
ANS: T PTS: 1 REF: 334
8. SONET is proprietary, so point-to-point network equipment can get expensive.
ANS: F PTS: 1 REF: 337
9. When you use a modem to access the Internet, you most likely use PPP.
ANS: T PTS: 1 REF: 342
MODIFIED TRUE/FALSE
1. X.25 includes the LAPD protocol. _________________________
ANS: F, LAPB
PTS: 1 REF: 307
2. The advantage of a(n) smart card is that is can be equipped with a digital signature, access keys,
password access, and PIN to control logon access and access to files and data.
_________________________
, ANS: T PTS: 1 REF: 309
3. The figure above is an example of a(n) X.25 frame. _________________________
ANS: T PTS: 1 REF: 311
4. N-ISDN is the most commonly installed version of ISDN, and currently has a practical data
transmission rate that is equal to a T-1. _________________________
ANS: T PTS: 1 REF: 347
5. The figure above shows a(n) ISDN LAPD frame. _________________________
ANS: T PTS: 1 REF: 326
6. The SONET interface is called a DQDB, and consists of two shared fiber-optic media.
_________________________
ANS: F, SMDS
PTS: 1 REF: 328
7. DSL comes in many versions and is gathering interest among network administrators because it can
turn existing twisted-pair telephone wire into a high-speed WAN for communications up to 55 Mbps
(downstream). _________________________
ANS: T PTS: 1 REF: 348
8. SONET travels in a(n) bus topology. _________________________
ANS: F, ring
PTS: 1 REF: 339
9. High-speed Fast Ethernet technologies are beginning to challenge SONET and frame relay for
dominance in Ethernet-based metropolitan area networks. _________________________
