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When configuring the ISIS-TE met a pile of mpls dste command, or understand the good DSTE, read a afternoon no clue, this article writes the relationship of DSCP-PHB is quite clear, let's take a look ~~ DSCP (Differentiated Services CodePoint)

  Decimal Keyword Protocol ====================================== 0 HOPOPT IPv6 hop-by-hop Option 1 ICMP Internet Control Message 2 IGMP Internet Group Management 3 GGP gateway-to-Gateway 4. IP address (encapsulation) in the IP address) 5 ST stream 6

Network Address Translation (NAT): Network Address Translation is generated when IP addresses are increasingly lacking. Its main purpose is to reuse addresses. NAT is divided into two categories: Basic NAT and NAPT (Network Address/Port Translator ).

Rivers and Lakes !!The wireless secret that everyone is competing for-the unique nine swords are coming to the fore !!Those who win this book can win the world!L details:1. Adjust the channelApplication description:Because only some countries have

Interfaces in the LAN encapsulate the Ethernet type. In the WAN, the interface is generally a serial port encapsulation of ppp hdlc snip Frame-Realy ARP is used for Ethernet, And it communicates with MAC addresses. If both sides of the serial port

Use ucarp for virtual IP failover I. Overview 1. UCARP OverviewUCARP allows multiple hosts to share a virtual IP address to provide automatic fault recovery. When a host goes down, other hosts automatically take over the service. UCARP is the CARP

TCP is a connection-oriented protocol. Therefore, a connection must be established before both parties send data. This is totally different from the preceding protocol. All the Protocols mentioned above only send data. Most of them do not care

The Spanning Tree Protocol (Spanning Tree) is a layer-2 management protocol that selectively blocks redundant network links to eliminate L2 loops. It also supports link backup. Like other protocols, the Spanning Tree Protocol is constantly updated

1.1 tutorial purpose:Learn to use the TFTP Server.1.2 experiment contentL understand the significance of TFTP Server;L learn how to use the TFTP Server to save configuration files such as flash and startup-config on the vro;L learn how to load and

In the current network, IP addresses are divided into public IP addresses and private IP addresses. A public IP address is an IP address used by the Internet, and a private IP address is an IP address used in a LAN. A private IP address is a

We often record audit logs. How can we obtain the real IP address of the client? Let's take a look at the HTTP header. Before discussing how to obtain the Client IP address, we first understand the following three meanings: REMOTE_ADDR,

IANA has allocated the Class D address space to the IP multicast address. the address of the Class D space is located in the first four digits of the first byte and identified by the binary value 1110. therefore, the multicast address range is: 224.0

DNS uses the TCP protocol or UDP protocol. It is recognized that DNS uses both UDP and TCP port 53, this single application protocol uses two transmission protocols at the same time in the TCP/IP stack is also an alternative. However, few people

This indicates that port 80 (which is the Tomcat listening port) has been occupied by other programs. First, run the "netstat-ano" command to display the port status, and then find the port in the result, then, search for the corresponding program

PPP (Point-to-Point Protocol) workflow and features PPP (Point-to-Point Protocol) workflow: when a user dials an ISP, the modem of the router confirms the dial and a physical connection occurs. The PC sends a series of LCP groups (encapsulated into

ISO/OSI network models have been porting Android video codec recently. I haven't written a blog for a long time. I want to write something about the network. I first introduced the ISO network model to my shoes. First, I will draw a picture for your

MAC address-based ACL control ======= mac access-list extended MAC80185 deny host 00e0. 4c90. 01d1 any permit any! Www.2cto.com interface FastEthernet0/4 switchport access vlan 251 no ip address mac access-group MAC80185 in ================ =========

I. Communication modes are classified in IPv4 networks. There are three communication modes available for the host: 1. unicast: data communication between a single host and a single host 2. Broadcast: A single host sends data packets to all hosts in

Overview of TCP/IP learning Notes 1. hierarchical network protocols are generally developed at different levels, and each layer is responsible for different communication functions. A protocol family, such as t c p/I P, is a combination of multiple

TCP-IP learning notes of UDP (User Datagram Protocol) I. Introduction UDP is a simple datagram-oriented transport layer protocol: Each output operation of the process generates a UDP datagram, and assembled into an IP datagram to be sent. This is