Port number used by network time protocol ntp with udp is a 161 b 123 c 162 d 124 view answer answer b explanation the network time protocol is a clock synchronization network protocol implemented by using udp port number 123 to send and receive time stamps advertisement advertisement 6 what is the header size of a udp packet a 8 bytes b 8 bits c 16 bytes d 124 bytes . The tcp model stands for transmission control protocol whereas ip stands for internet protocol a number of protocols that make the internet possibly comes under the tcp ip model nowadays we do not hear the name of the tcp ip model much we generally hear the name of the ipv4 or ipv6 but it is still valid this model consists of 4 layers now we will look at the diagrammatic . Fragmentation at network layer internet protocol version 6 ipv6 internet protocol version 6 ipv6 header ip addressing classless addressing supernetting in network layer longest prefix matching in routers program to determine class network and host id of an ipv4 address c program to find ip address subnet mask default gateway ipv4 classless subnet equation introduction of . Note ip addresses are globally managed by internet assigned numbers authorityiana and regional internet registriesrir note while finding the total number of host ip addresses 2 ip addresses are not counted and are therefore decreased from the total count because the first ip address of any network is the network number and whereas the last ip address is reserved for broadcast ip
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