Shulou(Shulou.com)06/01 Report--

This article introduces the knowledge of "what are the very important protocols of CCNP". In the operation of practical cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

CCNP certification indicates that senior network engineers have the ability to install, configure, and troubleshoot converged Lans and WANs from 100nodes to more than 500nodes. Senior network engineers with CCNP certification have the knowledge and skills to manage the routers and switches that form the core of the network, as well as edge applications that integrate voice, wireless, and security into the network.

IS-IS

(IS-IS:Intermediate System to Intermediate System Routing Protocol) routing Protocol from Intermediate system to Intermediate system (IS-IS) is a routing protocol proposed by ISO. It is a link-state protocol.

In this protocol, IS (router) is responsible for exchanging routing information based on link cost and determining the network topology. IS-IS is similar to the Open shortest path first (OSPF) protocol of TCP/IP networks.

ISO network includes end system, intermediate system, Area and Domain. The terminal system refers to the user equipment and the intermediate system refers to the router. The local groups formed by routers are called "zones", and multiple areas form a "domain". IS-IS is designed to provide routing within a domain or within an area. IS-IS, combined with CLNP, ES-IS and IDRP protocols, provides a complete routing choice for the entire network.

IS-IS routing uses a two-tier routing system. Level 1 routers only know the topologies in their local area, including all routers and hosts, but not routers and destinations outside the area. The Level 1 router forwards all traffic destined for other areas to an L2 router in the area that knows the topology of level 2 and does not need to know any topology of level 1, unless the level 2 router is also the level 1 router in the area.

The IS-IS suitable for transmitting IP network information is called Integrated IS-IS (Integrated IS-IS). Among the current routing protocols, Integrated IS-IS has the most important feature: it supports VLSM and fast convergence. In addition, it is scalable and can support large-scale networks.

IOS definition

Cisco's Internet operating system (IOS) is a complex operating system optimized for Internet interconnection-similar to a local operating system (NOS), such as Novell's NetWare, optimized for LANs. IOS provides uniform rules for maintaining an Internet network economically and effectively for a long time.

In short, it is a software architecture separate from hardware, which can be dynamically upgraded to adapt to changing technologies (hardware and software) with the continuous development of network technology. IOS can be seen as an interconnection hub: a highly intelligent administrator responsible for managing functions that control complex distributed network resources.

IGP Interior Gateway Protocol

Interior Gateway Protocol (IGP) is a protocol designed to exchange data flow channel information between gateways in an autonomous network system (such as an autonomous network system within a local community). Network IP protocols or other network protocols often use these channel information to determine how to transmit data streams.

At present, the two most commonly used internal gateway protocols are routing Information Protocol (RIP) and shortest path first routing protocol. At present, IGP has RIP, OSPF, IGRP, EIGRP, IS-IS and other protocols.

IPv6

IPv6 is the abbreviation of Internet Protocol Version 6, in which Internet Protocol is translated as "Internet Protocol".

IPv6 is the next generation IP protocol designed by IETF (Internet Engineering Task Force, Internet Engineering Task Force) to replace the current version of IP (IPv4).

At present, the protocol family adopted by the global Internet is the TCP/IP protocol family. IP is the network layer protocol of the TCP/IP protocol family and the core protocol of the TCP/IP protocol family.

At present, the version number of the IP protocol is 4 (IPv4 for short), and its next version is IPv6. IPv6 is in the process of continuous development and improvement, and it will replace the widely used IPv4 in the near future. Everyone will have more IP addresses.

STP spanning Tree Protocol

The protocol can be applied to the loop network to achieve path redundancy through certain algorithms, and at the same time, the loop network is trimmed into a tree network without loop, so as to avoid the proliferation and infinite circulation of packets in the loop network.

The basic principle of STP is to determine the topology of the network by passing a special protocol message between switches, which is called a "configuration message" in IEEE 802.1D. The configuration message contains enough information to ensure that the switch completes the spanning tree calculation.

The main application of spanning Tree Protocol is to avoid the network loopback in the local area network and to solve the "broadcast storm" problem of the looped Ethernet network. in a sense, it is a kind of network protection technology. circular connections caused by errors or accidents can be eliminated.

This is the end of the content of "what are the very important agreements of CCNP". Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.