1. Which protocol does DHCP use at the Transport layer?
- a) IP
- b) TCP
- c) UDP
- d) ARP
Answer: C - DHCP (Dynamic Host Configuration Protocol) uses UDP (User Datagram Protocol) at the Transport layer (ports 67 and 68).
2. What protocol does PPP use to identify the Network layer protocol?
- a) NCP
- b) ISDN
- c) HDLC
- d) LCP
Answer: A - PPP uses NCP (Network Control Protocol) to identify and configure Network layer protocols like IP, IPX, and AppleTalk.
3. An interconnected collection of piconet is called_______
- a) scatternet
- b) micronet
- c) mininet
- d) none of the mentioned
Answer: A - An interconnected collection of piconets is called a scatternet in Bluetooth technology.
4. Which of the following are uses of Computer Network ?
- a) All of these
- b) Powerful Communication Medium
- c) Providing High Reliability
- d) Resource Sharing
Answer: A - Computer networks provide powerful communication medium, high reliability, and resource sharing - all of the above.
5. CAT5E Wire are STP cable_______
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: B - FALSE. CAT5E wire is typically UTP (Unshielded Twisted Pair), not STP (Shielded Twisted Pair).
6. RJ45 stands_______
- a) Registered junction
- b) Registered joint
- c) Registered jack
- d) Registered jacket
Answer: C - RJ45 stands for Registered Jack 45, a standardized connector for Ethernet networking.
7. Network HUB better than Switch_______
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: B - FALSE. Switches are better than hubs because they provide dedicated bandwidth and reduce collisions.
8. Notebook computers with integrated Wi-Fi adapters_______
- a) FALSE
- b) TRUE
- c) N.A.
- d) N.A.
Answer: B - TRUE. Most modern notebook computers come with integrated Wi-Fi adapters for wireless connectivity.
9. BNC is Connector_______
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: A - TRUE. BNC (Bayonet Neill-Concelman) is a type of connector used for coaxial cables.
10. Subnet Mask use in 'C' Class IP address_______
- a) 255
- b) 255.255.255
- c) 255.255
- d) None of this
Answer: B - Class C IP address uses subnet mask 255.255.255.0 (first 3 octets for network, last for hosts).
11. Through Network we cannot share a CD-RW_______
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: B - FALSE. We can share CD-RW drives and other storage devices over a network.
12. Numbers of colors in cat 5 cable_______
- a) 4
- b) 6
- c) 7
- d) 8
Answer: D - CAT5 cable has 8 wires (4 pairs) with 8 different colors: Blue, Orange, Green, Brown with white stripes.
13. Which WLAN IEEE specification allows up to 54Mbps at 2.4GHz?
- a) A
- b) B
- c) G
- d) N
Answer: C - IEEE 802.11g operates at 2.4GHz with speeds up to 54Mbps (backward compatible with 802.11b).
14. ___ mode network can send and receive in a single operation
- a) Half Duplex
- b) Full Duplex
- c) Duplex
- d) None of this
Answer: A - Half Duplex mode allows sending and receiving but not simultaneously (single operation at a time).
15. CAT5E Wire are 8 wire and 4 pair_______
- a) Yes
- b) No
- c) N.A.
- d) N.A.
Answer: A - Yes, CAT5E cable contains 8 wires arranged as 4 twisted pairs (4 pairs).
16. Computer Network can save lot of money on Resources such as printers, scanners.
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: A - TRUE. Networks allow resource sharing (printers, scanners), reducing costs by sharing peripherals.
17. A central computer surrounded by one or more computers is called_______
- a) ring network
- b) bus network
- c) star network
- d) all of above
Answer: C - A central computer connected to multiple computers describes a star network topology.
18. The first Network_______
- a) CNNET
- b) NSFNET
- c) ASAPNET
- d) ARPANET
Answer: D - ARPANET (Advanced Research Projects Agency Network) was the first operational packet-switching network (1969).
19. STAR is a_______
- a) Topology
- b) Protocol
- c) OS
- d) N.A.
Answer: A - STAR is a network topology where all devices connect to a central hub/switch.
20. Which command is used to upgrade an IOS on a Cisco router?
- a) copy tftp run
- b) copy tftp start
- c) config net
- d) copy tftp flash
Answer: D - "copy tftp flash" is the Cisco IOS command to upgrade router firmware from a TFTP server.