Network Kings

IP header

IP header

IP Header and Function of Each Field Are you curious to know IP header in detail? Then, you are are at right place. In this lesson we will learn format of IP header and function of each field. This lesson is also important from interview point of view. Without wasting more time let’s start. IP … Read more

What is DAI (Dynamic ARP Inspection)?

What is DAI (Dynamic ARP Inspection)?

Dynamic ARP Inspection Introduction: DAI is a layer 2 security, configured on switches. It monitors the incoming ARP messages on untrusted ports. To filter, DAI compares these messages with DHCP snooping binding table and any configured ARP ACLs. If ARP message doesn’t match with table entry, then it discards the packet. To understand how DAI … Read more

What is DHCP Snooping?

What is DHCP Snooping?

Dynamic Host Configuration Protocol Snooping DHCP Snooping is configured on switches and enable on layer 2 port, its function is same as ACL and packet filter firewall in router. It monitors the incoming DHCP messages and use the logic to filter the messages.(never filter non DHCP messages) DHCP Snooping constantly monitors the DHCP packets to … Read more

What is Port Security?

What is Port Security?

Port Security in Computer Network In this lesson, we will discuss what is port security? And what role it plays in security?  So stay tuned till the end and learn with Nwkings. Layer 2 security is very crucial to secure the LAN networks. Switch is directly connected with end hosts. So, there is a possibility … Read more

What is ACL(Access Control List)?

What is ACL(Access Control List)?

Access Control List Introduction: ACL stands for Access Control List. ACL name itself define its function, ACL rules are configured to control the access inside the network (which hosts are allowed and which aren’t).  Sometime ACL also known as packet filter firewall, as ACL filters the packet based on configured rules, it decides which packet … Read more

How to secure the network devices?

How to secure the network devices?

Secure The Network Devices In this lesson, we will learn how to secure the network devices. There are various approaches that we can use to secure the network. By securing the CLI By using Firewall By using IPS We will discuss these 3 one by one. First method to secure the device is to secure … Read more

What is SDN(software defined Networking)?

What is SDN(software defined Networking)?

Software Defined Networking In this article, we will learn concept of SDN (software defined Network) or controller-based networking. Before dive into SDN concept, first we will discuss 3 planes of network devices. Understanding of these plane functions will help you to understand the concept of SDN. Network devices task are categorized in 3 planes- Data … Read more

Ospfv3 ipv4 configuration

Ospfv3 ipv4 configuration

conf t hostname R1 ipv6 unicast-routing router ospfv3 1 address-family ipv4 router-id 1.1.1.1 int e0/0 ospfv3 1 ipv4 area 0 conf t hostname R2 ipv6 unicast-routing router ospfv3 1 address-family ipv4 router-id 1.1.1.2 int e0/0 ospfv3 1 ipv4 area 0

Security Fundamentals

Security Fundamentals

Network Security Fundamentals In this lesson, we will learn security fundamentals- that include possible security attacks, corresponding mitigation technique that is implemented to prevent the attack. First we need to understand why an organization needs security? There are 3 security principles i.e. CIA- confidentiality Integrity and Availability. Confidentiality– A system is said to be trustworthy only when … Read more

What is EIGRP?

What is EIGRP?

Introduction of EIGRP EIGRP stands for Enhanced Interior Gateway Routing Protocol. It is made by Cisco, before 2013 it was Cisco proprietary, but now it is open to all. But still some features are only supported to Cisco devices. It works on DUAL (Diffuse Update Algorithm). AD value of EIGRP = 90, External EIGRP =170 … Read more