Q#1: Ethernet is a:
(A) Wired LAN technology
(B) Wireless LAN technology
(C) Wide area network protocol
(D) None
Answer: (A) Wired LAN technology
Q#2: Ethernet frame consists of:
(A) Preamble, Destination, Source, Type/Length, Data, CRC
(B) Header only
(C) Data only
(D) None
Answer: (A) Preamble, Destination, Source, Type/Length, Data, CRC
Q#3: Ethernet uses:
(A) CSMA/CD for access control
(B) TDMA
(C) FDMA
(D) CDMA
Answer: (A) CSMA/CD for access control
Q#4: CSMA/CD stands for:
(A) Carrier Sense Multiple Access with Collision Detection
(B) Carrier Sense Multiple Access with Collision Avoidance
(C) Code Division Multiple Access
(D) None
Answer: (A) Carrier Sense Multiple Access with Collision Detection
Q#5: Ethernet speed variants include:
(A) 10 Mbps, 100 Mbps, 1 Gbps, 10 Gbps
(B) 1 Mbps only
(C) 100 Mbps only
(D) None
Answer: (A) 10 Mbps, 100 Mbps, 1 Gbps, 10 Gbps
Q#6: Ethernet uses which topology?
(A) Bus and star (switched Ethernet)
(B) Ring only
(C) Mesh only
(D) None
Answer: (A) Bus and star (switched Ethernet)
Q#7: Maximum Ethernet frame size is:
(A) 1518 bytes including header and CRC
(B) 1024 bytes
(C) 512 bytes
(D) None
Answer: (A) 1518 bytes including header and CRC
Q#8: Minimum Ethernet frame size is:
(A) 64 bytes
(B) 128 bytes
(C) 32 bytes
(D) None
Answer: (A) 64 bytes
Q#9: Preamble in Ethernet frame:
(A) Synchronizes sender and receiver
(B) Contains data
(C) Contains CRC
(D) None
Answer: (A) Synchronizes sender and receiver
Q#10: Ethernet addresses are:
(A) MAC addresses (48-bit)
(B) IP addresses
(C) Port numbers
(D) None
Answer: (A) MAC addresses (48-bit)
Q#11: MAC address format:
(A) 6 bytes (48 bits)
(B) 4 bytes
(C) 8 bytes
(D) None
Answer: (A) 6 bytes (48 bits)
Q#12: Collision domain in Ethernet is:
(A) A network segment where collisions can occur
(B) Entire network
(C) Only wireless LAN
(D) None
Answer: (A) A network segment where collisions can occur
Q#13: Switched Ethernet reduces:
(A) Collisions
(B) Bandwidth
(C) Data size
(D) None
Answer: (A) Collisions
Q#14: Hub-based Ethernet is:
(A) Shared medium
(B) Point-to-point
(C) Full-duplex
(D) None
Answer: (A) Shared medium
Q#15: Switch-based Ethernet is:
(A) Full-duplex
(B) Half-duplex only
(C) Only CSMA/CD
(D) None
Answer: (A) Full-duplex
Q#16: Ethernet frame type field indicates:
(A) Type of protocol in data field
(B) CRC
(C) MAC address
(D) None
Answer: (A) Type of protocol in data field
Q#17: CSMA/CD detects collision by:
(A) Listening while transmitting
(B) Sending time slots
(C) Using codes
(D) None
Answer: (A) Listening while transmitting
Q#18: Upon collision, Ethernet stations:
(A) Stop, send jam signal, wait random time before retry
(B) Continue transmitting
(C) Use codes
(D) None
Answer: (A) Stop, send jam signal, wait random time before retry
Q#19: Ethernet uses:
(A) Binary exponential backoff algorithm for retransmission
(B) Fixed delay
(C) Frequency hopping
(D) None
Answer: (A) Binary exponential backoff algorithm for retransmission
Q#20: Twisted pair Ethernet standard:
(A) 10BASE-T, 100BASE-TX
(B) 10BASE-5
(C) 1000BASE-CX
(D) None
Answer: (A) 10BASE-T, 100BASE-TX
Q#21: Coaxial Ethernet standard:
(A) 10BASE-5, 10BASE-2
(B) 100BASE-TX
(C) 1000BASE-T
(D) None
Answer: (A) 10BASE-5, 10BASE-2
Q#22: Fiber optic Ethernet standard:
(A) 100BASE-FX, 1000BASE-LX
(B) 10BASE-T
(C) 10BASE-5
(D) None
Answer: (A) 100BASE-FX, 1000BASE-LX
Q#23: Half-duplex Ethernet allows:
(A) Transmission in one direction at a time
(B) Transmission both ways simultaneously
(C) No transmission
(D) None
Answer: (A) Transmission in one direction at a time
Q#24: Full-duplex Ethernet allows:
(A) Simultaneous transmission and reception
(B) Only one direction
(C) Only reception
(D) None
Answer: (A) Simultaneous transmission and reception
Q#25: 10BASE-T Ethernet uses:
(A) Twisted pair cable, 10 Mbps
(B) Coaxial cable, 100 Mbps
(C) Fiber, 1 Gbps
(D) None
Answer: (A) Twisted pair cable, 10 Mbps
Q#26: 100BASE-TX Ethernet uses:
(A) Twisted pair cable, 100 Mbps
(B) Fiber, 1 Gbps
(C) Coaxial, 10 Mbps
(D) None
Answer: (A) Twisted pair cable, 100 Mbps
Q#27: Gigabit Ethernet standard:
(A) 1000BASE-T (twisted pair)
(B) 10BASE-T
(C) 100BASE-TX
(D) None
Answer: (A) 1000BASE-T (twisted pair)
Q#28: 10 Gbps Ethernet standard:
(A) 10GBASE-SR (fiber)
(B) 100BASE-TX
(C) 10BASE-T
(D) None
Answer: (A) 10GBASE-SR (fiber)
Q#29: Ethernet CRC is used for:
(A) Error detection
(B) Flow control
(C) Addressing
(D) None
Answer: (A) Error detection
Q#30: Minimum frame size ensures:
(A) Collisions can be detected
(B) Bandwidth efficiency
(C) Addressing
(D) None
Answer: (A) Collisions can be detected
Q#31: Ethernet hub operates at:
(A) Physical layer
(B) Data link layer
(C) Network layer
(D) None
Answer: (A) Physical layer
Q#32: Ethernet switch operates at:
(A) Data link layer
(B) Physical layer
(C) Network layer
(D) None
Answer: (A) Data link layer
Q#33: MAC address is assigned by:
(A) Manufacturer
(B) User
(C) Network admin
(D) None
Answer: (A) Manufacturer
Q#34: Unicast Ethernet sends data to:
(A) Single destination
(B) All nodes
(C) Group of nodes
(D) None
Answer: (A) Single destination
Q#35: Broadcast Ethernet sends data to:
(A) All nodes on LAN
(B) Single node
(C) Group of nodes
(D) None
Answer: (A) All nodes on LAN
Q#36: Multicast Ethernet sends data to:
(A) Selected group of nodes
(B) Single node
(C) All nodes
(D) None
Answer: (A) Selected group of nodes
Q#37: Ethernet advantages include:
(A) Simple, cost-effective, high speed
(B) Complex, expensive
(C) Only wireless
(D) None
Answer: (A) Simple, cost-effective, high speed
Q#38: Ethernet limitations:
(A) Collision domain limits segment length
(B) Requires shared medium
(C) Half-duplex for hubs
(D) All of the above
Answer: (D) All of the above
Q#39: Switched Ethernet reduces:
(A) Collision domains
(B) Data rate
(C) MAC addresses
(D) None
Answer: (A) Collision domains
Q#40: CSMA/CD is used:
(A) Only in half-duplex
(B) Only in full-duplex
(C) Both
(D) None
Answer: (A) Only in half-duplex
Q#41: Ethernet uses:
(A) Binary exponential backoff
(B) Linear backoff
(C) No backoff
(D) None
Answer: (A) Binary exponential backoff
Q#42: Ethernet advantages over Token Ring:
(A) Simpler, cheaper
(B) Slower
(C) Complex
(D) None
Answer: (A) Simpler, cheaper
Q#43: Ethernet is defined in:
(A) IEEE 802.3 standard
(B) IEEE 802.11
(C) ISO 9001
(D) None
Answer: (A) IEEE 802.3 standard
Q#44: 10BASE-5 uses:
(A) Thick coaxial cable
(B) Twisted pair
(C) Fiber
(D) None
Answer: (A) Thick coaxial cable
Q#45: 10BASE-2 uses:
(A) Thin coaxial cable
(B) Twisted pair
(C) Fiber
(D) None
Answer: (A) Thin coaxial cable
Q#46: Collision occurs in Ethernet when:
(A) Two stations transmit at the same time
(B) Only one station transmits
(C) Switch forwards frames
(D) None
Answer: (A) Two stations transmit at the same time
Q#47: Jam signal in Ethernet:
(A) Alerts all stations of a collision
(B) Starts transmission
(C) End of frame
(D) None
Answer: (A) Alerts all stations of a collision
Q#48: Ethernet performance decreases with:
(A) High collision rate
(B) Low traffic
(C) High speed
(D) None
Answer: (A) High collision rate
Q#49: Ethernet is popular because:
(A) Simple, scalable, cost-effective
(B) Complex, expensive
(C) Wireless only
(D) None
Answer: (A) Simple, scalable, cost-effective
Q#50: Primary purpose of Ethernet:
(A) Reliable LAN communication
(B) Wide-area network
(C) Wireless LAN
(D) None
Answer: (A) Reliable LAN communication