The Ethernet II frame is the most commonly used Ethernet frame format. It consists of several fields, and its structure is well-defined in networking standards.
Structure of the Ethernet II Header :
Destination MAC Address (6 bytes) : Specifies the MAC address of the intended recipient.
Source MAC Address (6 bytes) : Specifies the MAC address of the sender.
EtherType (2 bytes) : Indicates the protocol encapsulated in the payload (e.g., IPv4, ARP).
Total Size :
The Ethernet II header without a VLAN tag is 14 bytes in size.
If a VLAN tag is added (using IEEE 802.1Q), the header size increases to 18 bytes due to the additional 4-byte VLAN tag.
Why Not Other Options?
32 bytes : This is incorrect because the Ethernet II header is much smaller.
22 bytes : This is incorrect because the header size is fixed at 14 bytes (without VLAN tagging).
18 bytes : This would only apply if VLAN tagging were included, which is not specified in the question.
Thus, the correct answer is 14 bytes .
References:
HCIA Huawei ACCESS Official Documentation , Chapter: Ethernet Frame Structure.
IEEE 802.3 Ethernet Standards .
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