LAN Switching and Wireless

581. The information to be communicated in a data communications system is the _________.

1. Medium
2. Protocol
3. Message
4. Transmission

View answer

582. The inner core of an optical fiber is _________ in composition.

1. glass or plastic
2. copper
3. bimetallic
4. liquid

View answer

583. The Internet model consists of _________ layers.

1. Three
2. Five
3. Seven
4. Eight

View answer

584. The Internetworking Protocol (IP) is a _________ protocol.

1. reliable
2. connection-oriented
3. both a and b
4. none of the above

View answer

585. The largest portion of the bandwidth for ADSL carries _________.

1. voice communication
2. upstream data
3. downstream data
4. control data

View answer

586. The local loop has _________ cable that connects the subscriber telephone to the nearest end office.

1. twisted-pair
2. coaxial
3. fiber-optic
4. none of the above

View answer

587. The maximum frame length for 10-Mbps Ethernet is _________ bytes.

1. 1518
2. 1500
3. 1200
4. none of the above

View answer

588. The maximum throughput for pure ALOHA is _________ per cent.

1. 12.2
2. 18.4
3. 36.8
4. none of the above

View answer

589. The minimum bandwidth of Manchester and differential Manchester is _________ that of NRZ.

1. the same as
2. twice
3. thrice
4. none of the above

View answer

590. The minimum frame length for 10-Mbps Ethernet is _________ bytes.

1. 32
2. 80
3. 128
4. none of the above

View answer