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1 . What device separates a single network into two segments but lets the two segments appear as one to higher protocols?
A. Switch B. Bridge
C. Router D. Gateway

2 . How many digits of the DNIC (Data Network Identification Code) identify the country?
A. first  B. first two
C. first three D. first four

3 . A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?
A. flooding B. delta routing
C. static routing D. hot potato routing

4 . Frames from one LAN can be transmitted to another LAN via the device
A. Bridge B. Router
C. Modem D. Repeater

5 . Which of the following condition is used to transmit two packets over a medium at the same time?
A. Collision B. Contention
C. Synchronous D. Asynchronous




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