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List of contents of this article:

• 1, Briefly describe the characteristics of the autonomous system
• 2, What is an autonomous system?
• 3, What is an autonomous system in a computer network?
• 4, The number range of the autonomous system registered on the Internet
• 5, What is an AS autonomous system? Is the local area network an AS?
• 6, The most widely used in the autonomous system

Briefly describe the autonomous systemFeatures

1. Multi-interface autonomous system (multihomed AS), which has multiple connections with other autonomous systems, but refuses to transmit through traffic. Transit AS, which has multiple connections with other autonomous systems, can transmit local traffic and through traffic under some strategic guidelines.

2. An autonomous system is sometimes also known as a routing domain. An autonomous system will assign a global unique 16-digit number, which we sometimes call the autonomous system number (ASN).

3. When the nonlinear autonomous system has equivalent negative damping, the constant periodic vibration exists when the equivalent damping is adjusted to zero.Autonomous system refers to a system that does not contain time t in the differential equation of motion. There are only three forms of motion in the linear autonomous system: divergent, conservative and attenuated.

4. An autonomous system is a router and network group under the control of a management agency. It can be a router directly connected to a LAN and also connected to the Internet; it can be a multiple local area network interconnected by the enterprise backbone network.

What is an autonomous system?

An autonomous system is a router and network group under the control of a management agency. It can be a router directly connected to a LAN and also connected to the Internet; it can be a multiple local area network interconnected by the enterprise backbone network.

Computer network refers to a computer system that connects multiple computers with independent functions with different geographical locations and their external devices through communication lines to realize resource sharing and information transmission under the management and coordination of network operating systems, network management software and network communication protocols.

Autonomous System refers to a set of networks that use a unified internal routing protocol.

What is an autonomous system in a computer network?

Computer network refers to a computer system that connects multiple computers with independent functions and their external devices with different geographical locations through communication lines to realize resource sharing and information transmission under the management and coordination of network operating systems, network management software and network communication protocols.

An autonomous system is a router and network group under the control of a management agency. It can be a router directly connected to a LAN and also connected to the Internet;It can be a multiple local area network interconnected by the enterprise backbone network.

In the Internet, an autonomous system (AS) is a small unit that has the right to independently decide what kind of routing protocol should be adopted in the system.

Autonomous system number scope registered on the Internet

1, allocated by IANA/autonomous system number range 1-65535, 1-65411 is registered lnternet compilation Number, the rest is the private network number.

2. BGP has experienced 4 versions RFC1105 (BGP-1), RFC1163 (BGP-2), RFC1267 (BGP-3), RFC1771 (BGP-4) The numbering range of the autonomous system The numbering range of the autonomous system is 1~65535, of which the Internet number registered by 1~65411 and the private network number of 65412~65535.

3、. as some routers managed by the same institution and casino plus free 100unified route selection strategy. 1-65411 is the registered Internet number, and 65412-65535 is the private network number. 5 bgp includes ibgp and ebgp. Generally, it is required to ensure a direct link between ebgp peers, and to ensure a logical full connection between ibgp.

4. The range is from 0 to 255. An IP address is a 32-bit binary number, which is usually divided into 4 "8-bit binary numbers" (i.e. 4 bytes). IP addresses are usually represented by "dot decimal" (a.The form of b.c.d). Among them, a, b, c and d are all decimal integers between 0 and 255.

What is an AS autonomous system? Is the local area network an AS?

In the Internet, an autonomous system (AS) is a small unit that has the right to independently decide what kind of routing protocol should be adopted in the system.

AS (autonomous system) Autonomous system is an independent kingdom in the Internet, and multiple ASs form the Internet. For example, ISPs such as China Mobile are an independent kingdom. This independent kingdom will be assigned an ASN (Autonomous System Number), and every user on the Internet is in AS.

Autonomous System is abbreviated as AS. An autonomous system is a router and network group under the control of a management agency. It can be a router directly connected to a LAN and also connected to the Internet; it can be a multiple local area network interconnected by the enterprise backbone network.

The most used in the autonomous system

1. The routing information protocol (RIP) is the first widely used protocol in the internal gateway protocol IGP [1058[1]]. RIP is a distributed routing selection protocol based on distance vector, which is the standard protocol of the Internet. Its biggest advantage is that it is simple to implement and less overhead.But RIP also has many disadvantages.

2. The internal gateway protocol IGP (InteriorGatewayProtocol) is a routing selection protocol used within an autonomous system, which has nothing to do with which routing selection protocol is selected by other autonomous systems on the Internet. This kind of routing selection protocol is the most used, such as RIP and OSPF protocols.

3. The RIP protocol has the following characteristics: (1) RIP is a protocol used internally in the autonomous system, that is, the internal gateway protocol, which uses a distance vector algorithm. ( 2) RIP uses UDP's 520 port for communication between RIP processes. ( 3) There are two main versions of RIP: RIPv1 and RIPv2. ( 4) The RIP protocol takes the number of hops as the network metric value.

4. External Gateway Protocol (EGP): The routing selection protocol is used between two autonomous systems. At present, the most widely used is BGP (i.e. BGP-4). The gateway here refers to the router. Routing protocol IGP (internal gateway protocol) is an agreement to exchange routing information between network gateways (host and router) in an autonomous network area.