mpls carrier

Gateway) mechanism to support some special application protocols, without any modification to the NAT platform, it has good scalability. The packets of these special protocols carry the address or port information, which may also need to be converted. Supported special protocols include: FTP (file transfer protocol, file transfer protocol), PPTP (Point-to-Point Tunneling Protocol, point-to-point tunnel protocol), ICMP (Internet Control Message Protocol, internet Control Message Protocol), DNS (

encapsulated at Layer 3rd of the network protocol stack. The following tunnel protocols are available:IPSecIP Security) Protocol: the IPSec protocol is not a separate protocol. It provides a complete set of architecture for data Security on the IP network, including AHAuthentication Header), ESPEncapsulating Security Payload) IKEInternet Key Exchange. To ensure the integrity, authenticity, anti-replay and private nature of data packets during network upload and transmission.GREGeneric Routing E

another, while the route table describes the network information and directs the data packet from one machine to another. 4. misunderstandings At present, many people understand the implementation of a system. These people are similar to three categories. The first type is proficient in Linux kernel, the second type is proficient in the configuration of Cisco devices, and the third type is proficient in Windows Network Programming and NDIS. The three types have very few common intersections, so

As a new network architecture, SDN has become a hot topic in the industry. The open network it advocates represents a change in the concept of network construction from adapting network capabilities to actively adapting network capabilities to the needs of network applications. Separation of forwarding and control, centralized control, and open network programming interfaces are the main features of SDN network architecture. As the main SDN protocol, openflow hopes to use a new forwarding protoc

The current network construction has been developed from the original regional network to cross-regional, trans-city wide area Connection, and the security requirements of the network and the increasing carrying business, with the original means of networking many problems difficult to solve. Because of the inherent advantages of MPLS VPN technology, the special network has solved the problems that bother users and integrators. The following is the us

clear boundary, Do not want to provide their own internal network information to other people to share. This kind of function is distinct and has the characteristic of stratification, it is the main characteristic of overlapping model. The Peer-to-peer model unifies the control plane of the optical transmission network level and the Service Exchange network level, uses the unified control plane, from the control point of view, they are equal, does not divide the upper and lower level, its addr

is through the RIP, OSPF, BGP, or MPLS tag protocol, the route path is mostly determined by the destination address. Therefore, the network traffic cannot be effectively distributed, or set a policy for network traffic. However, the Policy Routing Capability is sometimes one of the necessary functions in today's diversified network environments. For example, in the environment of a large network operator NSP, different users need to be connected to d

of ACL In the network, the ACL not only allows network administrators to set network policies, but also allows or denies the control of individual users or specific data streams. It can also be used to enhance network security shielding. From simple Ping to Death attacks and TCP Sync attacks to more complex hacker attacks, ACL can be shielded. Two types of ACLs are available: Standard ACL and extended ACLExtended ACL. Whether the edge is a layer-2 switch or layer-3 switch, it is best to support

devices should not only be able to execute complete ACL functions, including inbound and outbound capabilities, but must also emphasize the hardware processing capabilities. In this way, when the ACL is enabled, the ability of Layer 2 or Layer 3 switching devices to forward packets at the same time will not be affected. Generally, whether it is through the RIP, OSPF, BGP, or MPLS tag protocol, the route path is mostly determined by the destination ad

The first thing that comes to mind when we see routes is Cisco, which has become a mark that many humans cannot erase in the sea. As the founding manufacturer of routing technology, Cisco's position in routing has always been shaken by no one in the industry. Its research direction can always help the industry, it tells you where the routing technology is located, so that you are obsessed with the new applications that come from it. The eternal focus of routing technology is constantly changing.

networks. One is that the transmission layer shows the development trend of all-optical networks. From the ASON technology on the core layer to the FTTP technology on the access layer, there is no indication that the evolution of network bearer to light; in addition, service integration is based on IP addresses. The development of Internet makes IP addresses the ideal service bearer protocol. MSTP, RPR, MPLS, and other technologies are not the result