21 – IPv6
CCNA Introduction: Rationale for a New Version of IP IP version 6 is a new IP protocol designed to replace IP version 4, the Internet
CCNA 
19 – Inter Vlan Routing & Port Security
CCNA Understanding How InterVLAN Routing Works Network devices in different VLANs cannot communicate with one another without a router to
18 – VLAN & VTP
CCNA Introduction VLAN Trunk Protocol (VTP) reduces administration in a switched network. When you configure a new VLAN on one VTP server,
17 – Spanning Tree Protocol
CCNA Understanding Spanning-Tree Protocol Spanning-Tree Protocol is a link management protocol that provides path redundancy while
16 – NAT
CCNA Introduction If you are reading this, you are most likely connected to the Internet and there’s a very good chance that you are
15 – Extended Access List
CCNA Extended ACLs were introduced in Cisco IOS Software Release 8.3. Extended ACLs control traffic by the comparison of the source and
14 – Standard Access List
CCNA Standard IP Access List Logging Feature Summary The Cisco IOS software can now provide logging messages about packets permitted or
13 – EIGRP & VLSM
CCNA Enhanced Interior Gateway Routing Protocol (EIGRP) is a unique Cisco innovation. Highly valued for its ease of deployment and fast
12 – OSPF Part2
CCNA Introduction The Open Shortest Path First (OSPF) protocol, defined in RFC 2328 , is an Interior Gateway Protocol used to distribute
11 – OSPF Part1
CCNA Introduction The Open Shortest Path First (OSPF) protocol, defined in RFC 2328 , is an Interior Gateway Protocol used to distribute
10 – RIP V 1
CCNA RIPv1 RFC 1058 from June 1988 defines RIPv1. RIP is a distance-vector routing protocol that uses router hop count as the metric. RIP is