MTU,MAC,IPv4 & IPv6

                                                      MAC Address

Ethernet technology is use MAC address for communication & Layer 2 address

MAC address is 6bytes – 48bits – Hexa decimal

MAC address should be unique address.

In MAC address 1^st 3bytes is provided by IEEE & remaining 3bytes is serial number.

MAC address is also called as Burn-in-address(BIA) which burn MAC in Network card.

                                                          IP address

IP address store in IP upper layer protocol stack.

IPV4 address is just of set of number, which assign to every devices to identify node in the network & its Layer 3 address.

IPV4 address 4bytes- 32bit decimal number & it’s divided into 4 octate.

IPv4 has 3types-

Unicast-

Multicast

Broadcast

IPv4 support VLSM, Fragmentation is done by sending and forwarding routes. SNMP is a protocol used for system management.

                                                      IPv6 address

Its 128bit Hexadecimal address.

This globally unique IPv6 address can communicate between two or more.

IPv6 has 2 types-

Multicast

Anycast

IPv6 does not support for VLSM, Fragmentation is done by the sender & SNMP does not support IPv6.

                                       Maximum Transfer Unit (MTU)

MTU allow 1500bytes of frame in Switch.

In Switch, Every port has MTU which has by default frame size is 1500bytes.

Switch cannot allow more than 1500byte size, but we can change MTU size upto 1600/1700byte.

If switch is Gigabit Ethernet, then MTU frame size will be 9000byte.

In N\W, the frame size is 1564/1592 byte.

1564byte is called baby Jumbo  &   1592byte is called Jumbo

This 1564byte and 1592byte is accept by switch, when the MTU size is 1600/1700byte.
 

If Frame size is larger than MTU is known as GAINT.

IF Frame size is lesser than 64byte is known as RUNT.

This both GAINT & RUNT is corrupted frame, switch cannot accept this frame & discard the frame.