CS601 Midterm Past Papers by Junaid

Q1. The original Ethernet technology with the data rate of 10Mbps is called_______?

a)Standard Ethernet · b)First Ethernet · C)Gigabit Ethernet

2. In pure ALOHA, vulnerable time is_______the frame transmission time.

a)same as · b)two times · c)three times · d)four times

3. Collisions in CSMA/CA are avoided through__________.

b)The contention window

c)Acknowledgement

Q4. Which one of the following is a correct controlled access method?

b)polling · c) token passing · d) all of the given

5. _______Works with topologies in which one device is designated as a primary station and other devices are secondary stations.

a)polling · b)token · c) reservation · d) none of the given

6. In ________Each band is reserved for a specific station, time and it belongs to the station all the time.

a)FDMA · b)TDMA · c)CDMA · d)CSMA

Q7. In_________each station is forced to send a frame only at the beginning of time slot.

1. slotted Aloha
2. Fragmented Aloha
3. none of the given
4. A personal computer or workstation on an Ethernet network must have______ card.

a)TDI · b)NIC · c)PCI

9. In the context of Ethernet implementations, maximum medium length of 10 Base F was________ meters.

a)500 · b)1000 · c)2000 · d)150

Q10. What was the main drawback in Aloha Random-Access method?

a)Redundancy in data · b) inconsistent data rate · c) potential collision · d) all of the given

11. MAC address is of _________.

a)24 bits · b)36 bits · c)42 bits · d)48 bits

12. Collisions in CSMA/CA are avoided through _______.

b)Acknowledgements

c)The contention window

13. Posts stand for

a)Plain old telephone set · b) plain old telephone service · c) plain old time sharing