Vaidikalaya

MCQ On Network Devices

Q1. What is used to convert digital signals to analog signals? (UGC NET 2018).
  1. Switch
  2. Modem
  3. Repeater
  4. Router

Answer: b, Modem

Solution: Modem performs modulation (digital ? analog).

Q2. Which device connects a LAN to the Internet? (RRB JE 2019).
  1. Switch
  2. Modem
  3. Hub
  4. Repeater

Answer: b, Modem

Solution: Modem connects LAN to ISP.

Q3. A modem is used to:.
  1. Convert analog to digital
  2. Convert digital to analog
  3. Both (a) and (b)
  4. None

Answer: c, Both (a) and (b)

Solution: Modem = Modulator + Demodulator.

Q4. The term modem stands for:.
  1. Modern Emulator
  2. Modulator–Demodulator
  3. Modular Emulator Device
  4. Multiple Device Modem

Answer: b, Modulator–Demodulator

Solution: Full form of modem.

Q5. A modem works at which OSI layer?.
  1. Physical
  2. Data link
  3. Network
  4. Transport

Answer: a, Physical

Solution: Modem handles signals only.

Q6. Which is NOT a function of a modem?.
  1. Signal modulation
  2. Error correction
  3. Signal amplification
  4. Demodulation

Answer: c, Signal amplification

Solution: Amplification done by repeater.

Q7. Modems are commonly used in:.
  1. Dial-up
  2. DSL broadband
  3. Cable internet
  4. All of these

Answer: d, All of these

Solution: All use modems.

Q8. Modulation is performed at:.
  1. Sending end
  2. Receiving end
  3. Both ends
  4. None

Answer: a, Sending end

Solution: Modulation before transmission.

Q9. Demodulation means:.
  1. Digital ? analog
  2. Analog ? digital
  3. Multiplexing
  4. Noise filtering

Answer: b, Analog ? digital

Solution: Demodulation extracts digital data.

Q10. Which modem uses telephone lines?.
  1. Cable
  2. DSL
  3. Dial-up
  4. WiFi

Answer: c, Dial-up

Solution: Dial-up uses analog phone lines.

Q11. High-speed coaxial cable modem?.
  1. DSL
  2. Fiber
  3. Cable
  4. Satellite

Answer: c, Cable

Solution: Cable internet uses coaxial cable.

Q12. ADSL modem is used for:.
  1. Asymmetric digital subscriber line
  2. Analog digital service link
  3. Automatic digital signaling line
  4. Asynchronous dedicated subscriber line

Answer: a, Asymmetric digital subscriber line

Solution: ADSL = asymmetric DSL.

Q13. Fastest modem type:.
  1. Dial-up
  2. DSL
  3. Cable
  4. Fiber optic

Answer: d, Fiber optic

Solution: Fiber has highest speeds.

Q14. True about modems:.
  1. Send digital signals
  2. Convert signals
  3. Operate only in LAN
  4. Layer 3 device

Answer: b, Convert signals

Solution: Modems convert signals for media.

Q15. Device connecting computer to ISP:.
  1. Switch
  2. Router
  3. Modem
  4. Bridge

Answer: c, Modem

Solution: Modem provides WAN connectivity.

Q16. Modem speed measured in:.
  1. Mbps
  2. Baud rate
  3. Hertz
  4. MHz

Answer: b, Baud rate

Solution: Baud = symbols per second.

Q17. Modem used in satellite:.
  1. DSL
  2. Dial-up
  3. VSAT
  4. Cable

Answer: c, VSAT

Solution: VSAT uses satellite link.

Q18. Hub OSI layer:.
  1. Data Link
  2. Physical
  3. Network
  4. Transport

Answer: b, Physical

Solution: Hub works on signals only.

Q19. Hub also known as:.
  1. Multiport repeater
  2. Multiport router
  3. Bridge
  4. Gateway

Answer: a, Multiport repeater

Solution: Hub repeats signals.

Q20. Hub function:.
  1. Routes packets
  2. Broadcasts data
  3. Filters MAC
  4. Creates domains

Answer: b, Broadcasts data

Solution: Hub broadcasts to all.

Q21. Hub collision domains:.
  1. One per port
  2. Two per port
  3. Only one
  4. Same as devices

Answer: c, Only one

Solution: Entire hub is one collision domain.

Q22. Limitation of hub:.
  1. High cost
  2. Works only WAN
  3. No filtering
  4. Fiber only

Answer: c, No filtering

Solution: Hub cannot filter traffic.

Q23. Hub amplifying signals:.
  1. Passive
  2. Active
  3. Intelligent
  4. Smart

Answer: b, Active

Solution: Active hubs regenerate signals.

Q24. Hub sends data to:.
  1. One device
  2. IP based
  3. All except source
  4. Router only

Answer: c, All except source

Solution: Hub broadcasts.

Q25. Hub topology:.
  1. Mesh
  2. Star
  3. Ring
  4. Bus

Answer: b, Star

Solution: Hub forms star topology.

Q26. Efficient device vs Hub:.
  1. Repeater
  2. Switch
  3. Modem
  4. Gateway

Answer: b, Switch

Solution: Switch reduces collisions.

Q27. Hub generation:.
  1. First
  2. Second
  3. Third
  4. Fourth

Answer: a, First

Solution: Hub is 1st gen device.

Q28. Hub without power:.
  1. Passive
  2. Active
  3. Intelligent
  4. Smart

Answer: a, Passive

Solution: Passive hubs need no power.

Q29. Hub increases:.
  1. Speed
  2. Collision probability
  3. Security
  4. Subnet efficiency

Answer: b, Collision probability

Solution: Hub increases collisions.

Q30. Hub transmission mode:.
  1. Simplex
  2. Half-duplex
  3. Full-duplex
  4. Auto-duplex

Answer: b, Half-duplex

Solution: Hub uses half-duplex.

Q31. Hub signal type:.
  1. Digital & analog
  2. Converts signals
  3. Only digital
  4. Only analog

Answer: c, Only digital

Solution: Hub handles digital signals.

Q32. Repeats signals without checking:.
  1. Router
  2. Switch
  3. Hub
  4. Firewall

Answer: c, Hub

Solution: Hub does not inspect frames.

Q33. Switch OSI layer:.
  1. Layer 1
  2. Layer 2
  3. Layer 3 only
  4. Layer 4

Answer: b, Layer 2

Solution: Switch forwards frames using MAC.

Q34. Switch uses:.
  1. IP
  2. Port
  3. MAC
  4. Domain

Answer: c, MAC

Solution: Switch builds MAC table.

Q35. Switch creates multiple:.
  1. Broadcast domains
  2. Collision domains
  3. Subnets
  4. VLANs

Answer: b, Collision domains

Solution: Each port is a collision domain.

Q36. Switch type:.
  1. Filtering
  2. Broadcasting
  3. Amplifier
  4. Converter

Answer: a, Filtering

Solution: Switch filters by MAC.

Q37. Lowest latency:.
  1. Store-and-forward
  2. Cut-through
  3. Fragment-free
  4. Hop-by-hop

Answer: b, Cut-through

Solution: Cut-through forwards early.

Q38. Full frame checking mode:.
  1. Cut-through
  2. Fragment-free
  3. Store-and-forward
  4. Rapid

Answer: c, Store-and-forward

Solution: Waits for full frame.

Q39. MAC table purpose:.
  1. Store IP
  2. Reduce broadcast
  3. Map MAC to ports
  4. Convert signals

Answer: c, Map MAC to ports

Solution: Switch learns MACs.

Q40. Switch floods when:.
  1. MAC unknown
  2. MAC known
  3. Corrupted
  4. TTL expires

Answer: a, MAC unknown

Solution: Unknown MAC ? flooding.

Q41. VLAN created on:.
  1. Hub
  2. Repeater
  3. Switch
  4. Modem

Answer: c, Switch

Solution: VLAN supported by switches.

Q42. Loop prevention:.
  1. ARP
  2. STP
  3. ICMP
  4. DHCP

Answer: b, STP

Solution: STP blocks loops.

Q43. Layer 2 & 3 switch:.
  1. Managed
  2. Layer-3 switch
  3. Hub
  4. Repeater

Answer: b, Layer-3 switch

Solution: Performs routing + switching.

Q44. Broadcast handling:.
  1. Drops
  2. One port
  3. All except source
  4. Router

Answer: c, All except source

Solution: Broadcast flooded.

Q45. Device reducing collisions:.
  1. Hub
  2. Switch
  3. Repeater
  4. Modem

Answer: b, Switch

Solution: Switch reduces collisions.

Q46. Default switching:.
  1. Cut-through
  2. Store-and-forward
  3. Fast-forward
  4. Fragment-free

Answer: b, Store-and-forward

Solution: Most reliable mode.

Q47. Dynamic table built:.
  1. ARP
  2. Routing
  3. NAT
  4. MAC table

Answer: d, MAC table

Solution: Switch learns MAC dynamically.

Q48. A device that forwards packets based on IP address is called (GATE 2016).
  1. Switch
  2. Router
  3. Gateway
  4. Bridge

Answer: b, Router

Solution: Router forwards using IP.

Q49. Which device creates a separate broadcast domain? (CompTIA N+).
  1. Hub
  2. Switch
  3. Router
  4. Repeater

Answer: c, Router

Solution: Routers split broadcast domains.

Q50. Router OSI layer? (GATE 2014).
  1. Layer 2
  2. Layer 3
  3. Layer 5
  4. Layer 7

Answer: b, Layer 3

Solution: Routers operate at network layer.

Q51. Which address does router use?.
  1. MAC
  2. IP
  3. Port
  4. Physical

Answer: b, IP

Solution: Routing uses IP addresses.

Q52. Primary function of router.
  1. Regenerate signals
  2. Connect broadcast domains
  3. Filter MAC frames
  4. Error detection

Answer: b, Connect broadcast domains

Solution: Routers interconnect networks.

Q53. Routers break which domain?.
  1. Collision
  2. Broadcast
  3. Both
  4. None

Answer: b, Broadcast

Solution: Routers isolate broadcast domains.

Q54. Protocol used to find best path.
  1. SMTP
  2. OSPF
  3. FTP
  4. SNMP

Answer: b, OSPF

Solution: OSPF is a routing protocol.

Q55. Which is a routing protocol?.
  1. ARP
  2. RIP
  3. HTTP
  4. DHCP

Answer: b, RIP

Solution: RIP is used for routing.

Q56. Routers maintain which table?.
  1. ARP
  2. Routing
  3. MAC
  4. Port

Answer: b, Routing

Solution: Stores network routes.

Q57. Routing decision based on:.
  1. Dest MAC
  2. Source MAC
  3. Dest IP
  4. Source IP

Answer: c, Dest IP

Solution: Routing uses destination IP.

Q58. Manual configuration routing.
  1. Dynamic
  2. Static
  3. Default
  4. Link-state

Answer: b, Static

Solution: Static routes are manually set.

Q59. Routing protocol used on Internet.
  1. BGP
  2. RIP
  3. OSPF
  4. IGRP

Answer: a, BGP

Solution: BGP connects ISPs.

Q60. Device reducing broadcast traffic.
  1. Hub
  2. Switch
  3. Router
  4. Repeater

Answer: c, Router

Solution: Routers stop broadcasts.

Q61. Which NOT done by router?.
  1. Packet forwarding
  2. Path selection
  3. Broadcasting frames
  4. Network segmentation

Answer: c, Broadcasting frames

Solution: Routers do not broadcast.

Q62. Algorithm used by OSPF.
  1. Bellman-Ford
  2. Dijkstra
  3. A*
  4. RSA

Answer: b, Dijkstra

Solution: OSPF uses shortest path first.

Q63. Router connects networks with different:.
  1. IP schemes
  2. Media
  3. Topologies
  4. All

Answer: d, All

Solution: Routers interconnect diverse networks.

Q64. Which device amplifies signal? (SSC JE 2023).
  1. Repeater
  2. Switch
  3. Router
  4. Bridge

Answer: a, Repeater

Solution: Repeaters boost signals.

Q65. Repeater OSI layer.
  1. Data Link
  2. Network
  3. Physical
  4. Transport

Answer: c, Physical

Solution: Works at bit/signal level.

Q66. Main repeater function.
  1. Routing
  2. Regenerate/amplify
  3. Segment domains
  4. Prevent broadcast storms

Answer: b, Regenerate/amplify

Solution: Boosts signals.

Q67. Repeater used to:.
  1. Extend network
  2. Assign IPs
  3. Translate protocols
  4. Manage VLANs

Answer: a, Extend network

Solution: Extends cable range.

Q68. Repeater works with signals:.
  1. Digital only
  2. Analog only
  3. Both
  4. IP-header signals

Answer: c, Both

Solution: Handles analog & digital signals.

Q69. Repeater does NOT:.
  1. Regenerate signals
  2. Remove noise
  3. Forward bit-by-bit
  4. Filter MAC/IP

Answer: d, Filter MAC/IP

Solution: Repeaters do not filter traffic.

Q70. Repeaters increase performance by:.
  1. Reducing collisions
  2. Improving signal
  3. Assigning bandwidth
  4. Routing efficiently

Answer: b, Improving signal

Solution: Boosts signal quality.

Q71. A repeater does not understand:.
  1. Bits
  2. Voltage
  3. Frames
  4. Physical signals

Answer: c, Frames

Solution: Layers above L1 not understood.

Q72. Repeater true statement:.
  1. Has routing table
  2. Regenerates signals
  3. Divides broadcast domains
  4. Works at L2

Answer: b, Regenerates signals

Solution: Repeaters boost signals only.

Q73. Device copying electrical signals.
  1. Router
  2. Bridge
  3. Repeater
  4. Gateway

Answer: c, Repeater

Solution: Repeaters regenerate electrical signals.

Q74. Repeaters used mainly in:.
  1. WAN backbone
  2. Short-range networks
  3. Wi-Fi extenders
  4. VLAN segmentation

Answer: c, Wi-Fi extenders

Solution: Wireless repeaters boost Wi-Fi.

Q75. Firewall description.
  1. Stores passwords
  2. Security traffic controller
  3. Boosts speed
  4. Stores backups

Answer: b, Security traffic controller

Solution: Firewalls filter traffic.

Q76. Firewall OSI layer.
  1. Physical
  2. Data Link
  3. Network & Transport
  4. Presentation

Answer: c, Network & Transport

Solution: Packet & port filtering.

Q77. Firewall filtering by IP/port.
  1. Circuit gateway
  2. Packet filter
  3. App firewall
  4. Proxy

Answer: b, Packet filter

Solution: Filters headers only.

Q78. Firewall inspecting packet contents.
  1. Packet filter
  2. Stateless
  3. App-level gateway
  4. Hub firewall

Answer: c, App-level gateway

Solution: Deep inspection at L7.

Q79. Allows only internal initiated traffic.
  1. Port forwarding
  2. NAT
  3. Stateful inspection
  4. DMZ

Answer: c, Stateful inspection

Solution: Tracks connections.

Q80. Firewall between internet & internal.
  1. Modem
  2. Hub
  3. DMZ Firewall
  4. Router

Answer: c, DMZ Firewall

Solution: Placed at network edge.

Q81. Which can work as firewall?.
  1. Router
  2. Switch
  3. Hub
  4. Repeater

Answer: a, Router

Solution: Routers can filter traffic.

Q82. Proxy firewall OSI layer.
  1. L3
  2. L4
  3. L7
  4. L1

Answer: c, L7

Solution: Application layer proxy.

Q83. Firewall maintaining state table.
  1. Stateless
  2. Packet filter
  3. Stateful
  4. Proxy

Answer: c, Stateful

Solution: Tracks connection states.

Q84. Firewall main purpose.
  1. Increase bandwidth
  2. Block unauthorized access
  3. Format storage
  4. Encrypt files

Answer: b, Block unauthorized access

Solution: Primary security.

Q85. Firewall based on predefined rules.
  1. Stateful
  2. Stateless
  3. Circuit gateway
  4. Proxy

Answer: b, Stateless

Solution: Simple rule-based filtering.

Q86. Firewall simulating traffic.
  1. Packet filter
  2. Proxy firewall
  3. Repeater
  4. NAT device

Answer: b, Proxy firewall

Solution: Acts as intermediary.

Q87. Disadvantage of packet-filtering.
  1. Slow speed
  2. No content inspection
  3. Very expensive
  4. Needs modem

Answer: b, No content inspection

Solution: Only header-level filtering.

Q88. NOT a firewall function.
  1. Intrusion prevention
  2. Packet filtering
  3. File compression
  4. Access control

Answer: c, File compression

Solution: Not storage-related.

Q89. Gateway used to:.
  1. Connect similar nets
  2. Connect diff protocols
  3. Amplify signals
  4. Filter MAC

Answer: b, Connect diff protocols

Solution: Gateway converts protocols.

Q90. Gateway OSI layer.
  1. Layer1
  2. Layer2
  3. Layer3
  4. Layer7

Answer: d, Layer7

Solution: Application layer translation.

Q91. Gateway works at layers.
  1. 1-2
  2. 3-4
  3. 5-7
  4. Only 1

Answer: c, 5-7

Solution: Upper-layer functions.

Q92. Example of gateway.
  1. Switch
  2. Router
  3. Modem
  4. Hub

Answer: c, Modem

Solution: Modems act as gateways.

Q93. Type of translation by gateway.
  1. IP?MAC
  2. Regenerate signal
  3. Protocol conversion
  4. VLAN segmentation

Answer: c, Protocol conversion

Solution: Converts protocol formats.

Q94. Gateway can:.
  1. Break collisions
  2. Break broadcast domains
  3. Connect LAN-LAN same protocol
  4. Convert digital only

Answer: b, Break broadcast domains

Solution: Gateways isolate networks.

Q95. Device for networks w/ different architectures.
  1. Repeater
  2. Bridge
  3. Gateway
  4. Switch

Answer: c, Gateway

Solution: Used for TCP/IP ? ATM etc.

Q96. Gateways also called.
  1. Translators
  2. Repeaters
  3. Extenders
  4. Splitters

Answer: a, Translators

Solution: Convert data formats.

Q97. NOT done by gateway.
  1. Protocol conversion
  2. Data translation
  3. Network addressing
  4. Signal regeneration

Answer: d, Signal regeneration

Solution: Physical amplification not done.

Q98. Default gateway typically is:.
  1. Hub
  2. Switch
  3. Router
  4. Bridge

Answer: c, Router

Solution: Routers act as gateway.

Q99. Device at data link layer (GATE 2019).
  1. Repeater
  2. Hub
  3. Bridge
  4. Router

Answer: c, Bridge

Solution: Bridge works at L2.

Q100. Device connects LAN segments.
  1. Bridge
  2. Router
  3. Gateway
  4. Modem

Answer: a, Bridge

Solution: Bridges two LAN segments.

Q101. Bridge uses which address?.
  1. IP
  2. Port
  3. MAC
  4. URL

Answer: c, MAC

Solution: Bridges filter using MAC.

Q102. Main purpose of bridge.
  1. Amplify signals
  2. Connect LAN segments
  3. Assign IP
  4. Provide internet

Answer: b, Connect LAN segments

Solution: Links segments at L2.

Q103. Bridge divides network into:.
  1. Broadcast domains
  2. Collision domains
  3. IP subnets
  4. Freq bands

Answer: b, Collision domains

Solution: Each segment is separate collision domain.

Q104. Device filtering based on MAC.
  1. Repeater
  2. Hub
  3. Bridge
  4. Modem

Answer: c, Bridge

Solution: Bridge filters MAC.

Q105. Transparent bridge used in:.
  1. Token Ring
  2. Ethernet
  3. Frame Relay
  4. DSL

Answer: b, Ethernet

Solution: Common in LANs.

Q106. Bridge forwarding based on:.
  1. Routing table
  2. Bridge table
  3. ARP cache
  4. DNS

Answer: b, Bridge table

Solution: Stores MAC?port.

Q107. Bridge learns MAC by:.
  1. Manual config
  2. Listening frames
  3. DHCP
  4. DNS

Answer: b, Listening frames

Solution: Learns dynamically.

Q108. Bridge reduces:.
  1. Collision domains
  2. Broadcast domains
  3. Both
  4. None

Answer: a, Collision domains

Solution: Reduces collisions only.

Q109. Advantage of bridges.
  1. High bandwidth
  2. Reduce traffic
  3. Convert signals
  4. Assign IP

Answer: b, Reduce traffic

Solution: Filters unnecessary frames.

Q110. STP used for:.
  1. Compress data
  2. Prevent loops
  3. Increase bandwidth
  4. Convert signals

Answer: b, Prevent loops

Solution: STP avoids switching loops.

Q111. Bridge smarter than:.
  1. Router
  2. Repeater
  3. Switch
  4. Gateway

Answer: b, Repeater

Solution: Layer 2 intelligence.

Q112. Bridge inspecting entire frame.
  1. Cut-through
  2. Fast-forward
  3. Store-and-forward
  4. Passive

Answer: c, Store-and-forward

Solution: Checks frame fully.

Q113. Bridge table maps.
  1. IP?MAC
  2. MAC?Port
  3. Port?IP
  4. Subnet?Router

Answer: b, MAC?Port

Solution: Standard bridge mapping.

Q114. Bridges operate at sublayer.
  1. LLC
  2. MAC
  3. Transport
  4. Application

Answer: b, MAC

Solution: MAC sublayer of L2.