Network layer security comprises of different protocols that enhance the security of communication on the internet. These protocols are nothing but are some set of rules that identify how a message is being transferred between different computers. You may know that when the message is exchanged on then internet then the chances of some threats increases therefore network layer security is very important for maintaining the overall integrity and safety of a message.

Network Layer Security

There are five important protocols that are related to network layer message transfer process. Here is the short description of these protocols.


IP means Internet Protocol while the v4 refers to the fourth version of this protocol. It is also the very famous and internet protocol that helps in the safe and secure transfer of message in the form of packets from sender to receiver.


This is the sixth version of Internet protocols. It is not used as widely as the IPv4 however it is presumed that soon it will become the next generation protocol. The reason is that it is has handle the issues which the users face when they use the IPv4. What makes IPv6 different from that of IPv4 is the address space latter posses the larger space as compared to the former. Additionally, the header of IPv6 is designed in such a way that there are less chances of header overhead. The routing infrastructure of this protocol is very efficient therefore they user can enjoy the great internet experience through it.


CLNP means Connectionless Network Protocol though this protocol doesn’t use on internet but its service is used for the internet. The service offers by this protocol is named as Connectionless Network Service (CLNS). As indicated by its name this service doesn’t require a circuit establishment before data transmission. Just because of this service the message is transmitted independently from the source to its destination.


Internet Protocol Security is a protocol that uses the techniques of encryption and authentication for ensuring the safe transfer of every IP packet. This protocol transforms the data and content in two different ways; one is the Authentication Header (AH) and second is Encapsulating Security Payload (ESP). When the data transform through these protocols then the users get the many benefits such as data security, data integrity, authentication of data origin and anti-reply service.


ICMP is a termed used for Internet Control Message Protocol. This protocol is regarded very important as it is employed by the operating systems of network computers for sending an alert or error message. An error or alert message alerts the user that some service is not working properly or also give some other message related to network.

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