What is EtherType 0x0800?
The EtherType is the last two bytes in the Ethernet/IEEE 802.3 header, meaning that the next byte in the stream will be the first byte in the header of the next higher protocol. If the EtherType = 0x0800, the higher-layer protocol is IPv4. The first nibble is the version number; this value is 0x4 to indicate IPv4.
Why is NAT not needed in IPv6?
The end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet. Answers Explanation & Hints: The large number of public IPv6 addresses eliminates the need for NAT.
Why is IPv4 0x0800?
The “Type” field in Ethernet II frames tells the OS what kind of data the frame carries – 0x0800 means that the frame has an IPv4 packet; there’s a list of different EtherTypes. This field is needed because there are many other protocols that go directly over Ethernet: for example, IPv6, IPX, ARP, AppleTalk…
What protocol number is ICMP?
1
Header. The ICMP header starts after the IPv4 header and is identified by IP protocol number ‘1’. All ICMP packets have an 8-byte header and variable-sized data section.
What is an EtherType field in Ethernet?
If the field is greater than ’05DC’, the frame is an EtherType field and is an Ethernet Version 2 frame. IEEE 802.2 is not part of the definition of IEEE 802.3; however, it is always bound together with an IEEE 802.3 header.
What are the assigned numbers for EtherType protocol?
Ethernet assigned numbers. IEEE: Registration authority. Links: Ethertype Protocol 0x0000 0x05DC IEEE 802.3 length. 0x0600 XEROX NS IDP.
What is the difference between an EtherType field and a frame?
If the field is less than ’05DC’, it represents a length field, and the frame is an IEEE 802.3 Ethernet frame. If the field is greater than ’05DC’, the frame is an EtherType field and is an Ethernet Version 2 frame. IEEE 802.2 is not part of the definition of IEEE 802.3; however, it is always bound together with an IEEE 802.3 header.
What is the EtherType in the SNAP header?
The last 2 bytes of the SNAP header include the EtherType (sometimes called the protocol ID), which indicates the embedded non-compliant protocol. These are the same as the EtherTypes included in the Ethernet Version 2 frame format.