超星 - 自测题 ch5 - 查题吧

单选题

The device ( ) can isolate collision domains for each of the LAN segment.

A. modem
B. switch
C. hub
D. NIC

单选题

For( ) links that have a single sender at one end of the link and a single receiver at the other end of the link.

A. point-to-point
B. broadcast
C. multicast
D. all of the above

单选题

With ( )transmission, the nodes at both ends of a link may transmit packets at the same time.

A. half-duplex（半双工）
B. full-duplex（全双工）
C. simplex(单工)
D. synchronous

单选题

With ( ) transmission, a node can not both transmit and receive at the same time.

A. half-duplex（半双工）
B. full-duplex（全双工）
C. simplex(单工)
D. synchronous

单选题

Which of the following functions can’t be implemented in the NIC? ( )

A. encapsulation and decapsulation
B. error detection
C. multiple access protocol
D. routing

单选题

( )divides time into time frames and further divides each time frame into N time slots.

A. FDM
B. TDM
CDMA
D. CSMA

单选题

Which of the following four descriptions about random access protocol is not correct? ( )

A transmission node transmits at the full rate of the channel
B. When a collision happens, each node involved in the collision retransmits at once.
C. Both slotted ALOHA and CSMA/CD are random access protocols.
D. With random access protocol, there may be empty slots.

单选题

Which of the following is wrong? ( )

ARP table is configured by a system administrator
B. ARP table is built automatically
C. ARP table is dynamic
D. ARP table maps IP addresses to MAC addresses

单选题

The ( )field permits Ethernet to multiplex network-layer protocols.

A. preamble
B. type
CRC
D. destination MAC address

单选题

An entry in the switch table contains the following information excepts for ( )

A. the MAC address of a node
B. the switch interface that leads towards the node
C. the time at which the entry for the node was placed in the table
D. the IP address of a node

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