题目内容

单选题 What is the domain name in the email address kayla@pit.arc.nasa.gov?

A. kayla
B. pit.arc.nasa.gov
C. kayla@pit.arc.nasa.gov
D. nasa.gov

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单选题 A( ) is a connecting device that only regenerates the signal.

A. repeater
B. bridge
C. router
D. gateway

单选题 A ( ) is a connecting device that acts as a protocol converter.

A. repeater
B. bridge
C. router
D. gateway

单选题 A ( ) is a connecting device that segments traffic.

A. repeater
B. bridge
C. router
D. gateway

单选题 A ( ) is a connecting device that route a packer based on its network layer address.

A. bridge
B. route
C. repeater
D. all of the above