ICTN 2150 EXAM 2 QUESTIONS WITH VERIFIED
ANSWERS
1. What is the binary equivalent of the IPv4 address 192.168.1.1?
A) 11000000.10101000.00000001.00000001
B) 10101100.00010000.00000000.00000001
C) 10000000.00000000.00000000.00000001
D) 11111111.11111111.11111111.11111111 - Answers - A)
11000000.10101000.00000001.00000001
The decimal-to-binary conversion follows the IPv4 addressing system, where each octet
is converted separately.
2. Which layer of the OSI model is responsible for MAC addressing?
A) Physical
B) Data Link
C) Network
D) Transport - Answers - B) Data Link
The Data Link layer manages MAC addresses and is divided into the LLC and MAC
sublayers.
3. Which topology is commonly used for LANs?
A) Mesh
B) Star
C) Hub-and-spoke
D) Ring - Answers - B) Star
Most LANs use a star topology with a central switch connecting devices.
4. In a WAN, what topology connects multiple remote sites to a central location?
A) Full mesh
B) Hub-and-spoke
C) Ring
D) Bus - Answers - B) Hub-and-spoke
Hub-and-spoke topology connects branch offices to a central hub.
5. In half-duplex communication, how do devices transmit data?
A) They transmit and receive data simultaneously.
B) They take turns transmitting and receiving.
C) They use separate channels for sending and receiving.
D) They do not require collision detection. - Answers - B) They take turns transmitting
and receiving.
Half-duplex communication allows only one device to transmit at a time, requiring
collision detection in shared networks.
, 6. Where is CSMA/CD used?
A) Wireless networks
B) Ethernet networks using hubs
C) Switched Ethernet networks
D) Fiber optic networks - Answers - B) Ethernet networks using hubs
CSMA/CD detects and manages collisions in shared Ethernet environments.
7. Where is CSMA/CA used?
A) Ethernet networks
B) Wireless networks
C) Fiber-optic networks
D) Coaxial networks - Answers - B) Wireless networks
Wireless networks use CSMA/CA to avoid collisions by reserving the channel before
sending data.
8. What is NOT a field in an Ethernet frame?
A) Source MAC address
B) Frame Check Sequence
C) Destination MAC address
D) IP header - Answers - D) IP header
The Ethernet frame does not include an IP header; that is part of the Network layer.
9. What type of address is assigned to a network interface card at manufacturing?
A) Logical address
B) Physical address
C) Network address
D) IP address - Answers - B) Physical address
The MAC address (physical address) is burned into the NIC by the manufacturer.
10. Which protocol is commonly used at Layer 2 of a WAN?
A) TCP
B) PPP
C) IP
D) HTTP - Answers - B) PPP
The Point-to-Point Protocol (PPP) is used for WAN links.
11. What is a 'giant' Ethernet frame?
A) A frame smaller than 64 bytes
B) A frame between 64-1518 bytes
C) A frame larger than 1518 bytes
D) A frame with an invalid MAC address - Answers - C) A frame larger than 1518 bytes
Ethernet frames exceeding 1518 bytes are considered "giants."
12. What is the size range of a valid Ethernet frame?
A) 46-64 bytes
B) 64-1518 bytes
ANSWERS
1. What is the binary equivalent of the IPv4 address 192.168.1.1?
A) 11000000.10101000.00000001.00000001
B) 10101100.00010000.00000000.00000001
C) 10000000.00000000.00000000.00000001
D) 11111111.11111111.11111111.11111111 - Answers - A)
11000000.10101000.00000001.00000001
The decimal-to-binary conversion follows the IPv4 addressing system, where each octet
is converted separately.
2. Which layer of the OSI model is responsible for MAC addressing?
A) Physical
B) Data Link
C) Network
D) Transport - Answers - B) Data Link
The Data Link layer manages MAC addresses and is divided into the LLC and MAC
sublayers.
3. Which topology is commonly used for LANs?
A) Mesh
B) Star
C) Hub-and-spoke
D) Ring - Answers - B) Star
Most LANs use a star topology with a central switch connecting devices.
4. In a WAN, what topology connects multiple remote sites to a central location?
A) Full mesh
B) Hub-and-spoke
C) Ring
D) Bus - Answers - B) Hub-and-spoke
Hub-and-spoke topology connects branch offices to a central hub.
5. In half-duplex communication, how do devices transmit data?
A) They transmit and receive data simultaneously.
B) They take turns transmitting and receiving.
C) They use separate channels for sending and receiving.
D) They do not require collision detection. - Answers - B) They take turns transmitting
and receiving.
Half-duplex communication allows only one device to transmit at a time, requiring
collision detection in shared networks.
, 6. Where is CSMA/CD used?
A) Wireless networks
B) Ethernet networks using hubs
C) Switched Ethernet networks
D) Fiber optic networks - Answers - B) Ethernet networks using hubs
CSMA/CD detects and manages collisions in shared Ethernet environments.
7. Where is CSMA/CA used?
A) Ethernet networks
B) Wireless networks
C) Fiber-optic networks
D) Coaxial networks - Answers - B) Wireless networks
Wireless networks use CSMA/CA to avoid collisions by reserving the channel before
sending data.
8. What is NOT a field in an Ethernet frame?
A) Source MAC address
B) Frame Check Sequence
C) Destination MAC address
D) IP header - Answers - D) IP header
The Ethernet frame does not include an IP header; that is part of the Network layer.
9. What type of address is assigned to a network interface card at manufacturing?
A) Logical address
B) Physical address
C) Network address
D) IP address - Answers - B) Physical address
The MAC address (physical address) is burned into the NIC by the manufacturer.
10. Which protocol is commonly used at Layer 2 of a WAN?
A) TCP
B) PPP
C) IP
D) HTTP - Answers - B) PPP
The Point-to-Point Protocol (PPP) is used for WAN links.
11. What is a 'giant' Ethernet frame?
A) A frame smaller than 64 bytes
B) A frame between 64-1518 bytes
C) A frame larger than 1518 bytes
D) A frame with an invalid MAC address - Answers - C) A frame larger than 1518 bytes
Ethernet frames exceeding 1518 bytes are considered "giants."
12. What is the size range of a valid Ethernet frame?
A) 46-64 bytes
B) 64-1518 bytes
