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Which fields are contained within an IEEE Ethernet frame header?
- Source and destination MAC address
- Source and destination network address
- Source and destination MAC address and source and destination network address
- FCS field
- a)1 and 4
- b)2 only
- c)2 and 3 only
- d)3 only
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Which fields are contained within an IEEE Ethernet frame header? Sour...
An Ethernet frame has source and destination MAC addresses, an Ether-Type field to identify the Network layer protocol, the data, and the FCS field that holds the answer to the CRC.
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Which fields are contained within an IEEE Ethernet frame header? Sour...
IEEE Ethernet Frame Header Fields
The IEEE Ethernet frame header is a crucial component of Ethernet communication. It contains essential information necessary for transmitting and receiving data packets. The fields included in the IEEE Ethernet frame header are:
1. Source MAC Address:
- The source MAC address identifies the network interface card (NIC) of the sender device. It is a unique identifier assigned to the NIC and consists of six bytes (48 bits). The MAC address is used to determine the origin of the Ethernet frame.
2. Destination MAC Address:
- The destination MAC address represents the NIC of the intended recipient device. It is also a 48-bit identifier that uniquely identifies the device. The destination MAC address helps in delivering the Ethernet frame to the correct destination.
3. Source Network Address:
- The source network address is not included in the IEEE Ethernet frame header. This field is utilized in network layer protocols, such as IP, to identify the source device's network address.
4. Destination Network Address:
- Similarly, the destination network address is not a part of the IEEE Ethernet frame header. It is used in network layer protocols to identify the intended recipient's network address.
5. FCS (Frame Check Sequence):
- The FCS field is a 32-bit value that is added to the Ethernet frame to ensure data integrity. It is generated by performing a cyclic redundancy check (CRC) on the entire frame, including the header and data. The receiver device uses the FCS to verify if the data has been corrupted during transmission.
Explanation of Correct Answer (Option A):
The correct answer is option A, which states that the fields contained within an IEEE Ethernet frame header are the source and destination MAC address (1) and the FCS field (4). This answer is correct because the source and destination MAC addresses are essential fields included in the Ethernet frame header. The MAC addresses are used to identify the sender and recipient devices, ensuring proper delivery of the frame.
Additionally, the FCS field is necessary for error detection. By including the FCS in the Ethernet frame, the receiver can verify the integrity of the data. If the FCS checksum calculation matches the received FCS value, it indicates that the data has been successfully transmitted without any errors.
The source and destination network addresses are not part of the IEEE Ethernet frame header. They belong to the network layer protocols, such as IP, which operate above the data link layer where the Ethernet frame header is located.
The IEEE Ethernet frame header is a crucial component of Ethernet communication. It contains essential information necessary for transmitting and receiving data packets. The fields included in the IEEE Ethernet frame header are:
1. Source MAC Address:
- The source MAC address identifies the network interface card (NIC) of the sender device. It is a unique identifier assigned to the NIC and consists of six bytes (48 bits). The MAC address is used to determine the origin of the Ethernet frame.
2. Destination MAC Address:
- The destination MAC address represents the NIC of the intended recipient device. It is also a 48-bit identifier that uniquely identifies the device. The destination MAC address helps in delivering the Ethernet frame to the correct destination.
3. Source Network Address:
- The source network address is not included in the IEEE Ethernet frame header. This field is utilized in network layer protocols, such as IP, to identify the source device's network address.
4. Destination Network Address:
- Similarly, the destination network address is not a part of the IEEE Ethernet frame header. It is used in network layer protocols to identify the intended recipient's network address.
5. FCS (Frame Check Sequence):
- The FCS field is a 32-bit value that is added to the Ethernet frame to ensure data integrity. It is generated by performing a cyclic redundancy check (CRC) on the entire frame, including the header and data. The receiver device uses the FCS to verify if the data has been corrupted during transmission.
Explanation of Correct Answer (Option A):
The correct answer is option A, which states that the fields contained within an IEEE Ethernet frame header are the source and destination MAC address (1) and the FCS field (4). This answer is correct because the source and destination MAC addresses are essential fields included in the Ethernet frame header. The MAC addresses are used to identify the sender and recipient devices, ensuring proper delivery of the frame.
Additionally, the FCS field is necessary for error detection. By including the FCS in the Ethernet frame, the receiver can verify the integrity of the data. If the FCS checksum calculation matches the received FCS value, it indicates that the data has been successfully transmitted without any errors.
The source and destination network addresses are not part of the IEEE Ethernet frame header. They belong to the network layer protocols, such as IP, which operate above the data link layer where the Ethernet frame header is located.
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Which fields are contained within an IEEE Ethernet frame header? Sour...
An Ethernet frame has source and destination MAC addresses, an Ether-Type field to identify the Network layer protocol, the data, and the FCS field that holds the answer to the CRC.
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