Solved: what is the size of "double tagged (CTAG+STAG) ARP request packet" ?

ARP does not use an IPv4 header but uses its own EtherType of 0x0806. ARP's size is less than the minimum payload for Ethernet of 46 bytes, so the frame is padded to the minimum frame size of 64 bytes (including 18 bytes overhead[*1]).

Feb 16, 2023 · The ARP packet format is used for ARP requests and replies and consists of multiple fields including hardware type, protocol type, hardware and protocol size, operation, sender and target hardware, and IP addresses.

In this scenario, the packet has 48-bit fields for the sender hardware address (SHA) and target hardware address (THA), and 32-bit fields for the corresponding sender and target protocol addresses (SPA and TPA). The ARP packet size in this case is 28 bytes.

Jul 16, 2024 · What is the size of an ARP request and reply packet? The size of an ARP request or reply packet is 28 bytes. How to differentiate between a ARP request packet and a ARP reply

The ARP message format is designed to accommodate layer two and layer three addresses of various sizes. This diagram shows the most common implementation, which uses 32 bits for the layer three (“Protocol”) addresses, and 48 bits for the layer two hardware addresses.

Aug 21, 2022 · An ARP packet is either a request packet or a reply packet. An ARP request packet can be differentiated from an ARP reply packet using the operation field, i.e., opcode in the ARP packet. For ARP Request, it is 1.

Apr 3, 2021 · The size of an ARP request or reply packet is 28 bytes. Why is the ARP request 42 bytes long? Just discovered that ARP request messages are padded with 18 bytes of trailing zero bytes, making them 60 bytes long instead of 42 bytes.

Oct 7, 2019 · The hardware size is the size of the hardware address. For ethernet, this would be six octets (48 bits). The protocol size is the size of the network protocol address.

ARP Packet Format: ARP Packet Field Descriptions. Ethernet Frame Type---For an ARP request/reply, this field is 0x0806. This is sometimes referred as the Ethertype field. Note that this is not actually part of the ARP packet, but belongs to the Ethernet header. Hardware Type---Type of hardware address; this is 1 for Ethernet.