IPv4

Question 1

Version

Answer 1

A four bit field that indicates that IP version being used and is always said to a value of four for IPV4 headers 

Question 2

Internet header length IHL

Answer 2

A 4 bit field that indicates the number of 32 bit words in the header, and can have the value in the range from 5 to 15. 

Question 3

Type of service space TOS

Answer 3

An 8-bit field used to indicate the priority of the packet, and is typically divided into a six bit differentiated service code point DSCP field and a two bit explicit congestion notification ECN field

Question 4

Total length

Answer 4

A 16 bit field that specifies the total size of the packet in bytes

Question 5

Identification

Answer 5

A 16 bit field used to logically grouped together, multiple fragments, making up a data gram 

Question 6

Flags

Answer 6

A 32 bit field used to control packet fragmentation

Question 7

Fragment, offset

Answer 7

A 13 bit field used to identify where a fragment was originally located in and on fragmented data gram

Question 8

Time to live TTL

Answer 8

An eight bit field used to prevent routing groups by being D incremented by one at each router hop until the packet is discarded when the TTL = zero 

Question 9

Protocol

Answer 9

An 8-bit field used to identify the type of data being carried by the packet

Question 10

Header checksum

Answer 10

A 16 bit field used to check the header for errors

Question 11

Source IP address

Answer 11

A 32 bit address specifying, the IPv4 address of the sender 

Question 12

Designation

Answer 12

A 32 bit address specifying the IPv4 address of the receiver 

Question 13

Options

Answer 13

A rarely used field that can specify additional IP V4, header options. Note the options field is populated if the Internet header length > five.