Others

1. Turn off the automatic summary function of all the above routers,2. Some loopback ports are added to R2 to run the OSPF protocol. The router information obtained by R1 is 3. On R24. view the learned route entries on the R1 and R3 routes.  

NAT configuration points: 1. ACL 2. NAT address pool 3. Apply NAT to the corresponding interface 4. one-to-many or one-to-one ing !Ip access-list standard 210 permit any!!!Interface GigabitEthernet 0/1Ip nat insideIp address 8.1.1.2

Tool used in the experiment: Xiao fan SimulatorExperiment: Frame Relay 1. router configuration for simulating Frame Relay:FR-S (Frame Relay)Router>Router> enableRouter # config terminalRouter (config) # hostname FR-S-jinFR-S-jin (config) #

1,HSRP does not support setting real interface addresses to virtual gateway addresses, while VRRP supports2. HSRP carries packets on UDP packets, while VRRP carries packets on TCP packets. 3. HSRP has three types of packets, and three statuses can

I. DNS packets It is mainly used to view the Flag Fields in the DNS packet header. [QR] [opcode] [AA] [TC] [RD] [RA] [(zone)] [rcode]When the client sends a DNS query request, when the TC (delete flag) bit in the response packet received from the

  The MAC address in the IPv4 environment has become a common topic. Here is a summary and sharing.   In the TCP/IP architecture, MAC addresses play a very important role. In communication, the host Nic identified by the MAC address serves as the

IP address and subnet mask We all know that IP addresses are composed of four digits. Here, let's take a look at three common types of IP addresses. Class a ip segments 0.0.0.0 to 127.255.255.255 Class B IP segments 128.0.0.0 to

Bridge: The predecessor of A vswitch, which refers to vswitch 1: STP OverviewSTP (Spanning Tree Protocol, Spanning Tree Protocol)Is to change a ring structure into a tree structure. It is used to logically block a network with loops and generate a

1 fault symptomMy colleagues in the Department had remote access through the network in the office. They had been normal before and suddenly could not be remotely accessed yesterday.2 positioning processThey once assigned a fixed IP address to the

1. Brief Introduction to UDPUDP is a transport layer protocol, which is in a layer with TCP protocol. However, unlike TCP, UDP does not provide timeout retransmission, error retransmission, and other functions, that is, it is an unreliable protocol. 

Timeout retransmission is another important mechanism for TCP to ensure data reliability. Its principle is to enable a timer after a certain data is sent, if the ACK packet of the sent datagram is not received within a certain period of time, the

Configure VRRP for Load BalancingApplication EnvironmentServer Load balancer creates multiple backup groups to share network traffic. A vro can belong to multiple backup groups. The operation is as follows: Vroa A acts as the Master of Backup group 1

Refer to the RFC document: 0.0.0.0/8-Addresses in this block refer to source hosts on "this"Network. Address 0.0.0.0/32 may be used as a source address for thisHost on this network; other addresses within 0.0.0.0/8 may be usedRefer to specified

The descriptions of link status information in OSPF are encapsulated and released in LSA. Common LSA has the following types:Router LSA (Type1): This is generated by each vro. It describes the link status and overhead of the vro and transmits the

NDP (Neighbor Discovery Protocol, Neighbor Discovery Protocol) is a key Protocol of IPv6. It combines ARP, ICMP Router Discovery, ICMP redirection and other protocols in IPv4 and improves them. As the basic protocol of IPv6, NDP also provides

The process of three handshakes when a TCP connection is established.The process of three handshakes when a TCP connection is established is briefly described. According to the TCP header, the order of the following three packets in the connection

Https communication principle1. What is Https? Https is an Http channel for security purposes. Its security base is guaranteed by the SSL layer. Initially developed by netscape, it mainly provides identity authentication and encrypted communication

The introduction to the network access technology of yunke has different access methods for different networks. What we need to do today is to give you a better understanding of Ethernet Access and wireless network access. I. Ethernet Access 1. With

During the re-release of routes between IGRP, OSPF, and OSPF, I don't know what I am busy with. I 've been writing this article for a week. I don't know how to take the test in March /, main contents of this experiment: 1) Release of the classless

(1) IPv4 HeaderThe first field of the version IP packet header is the 4-bit version field. For IPv4, the value of this field is 4.The second field of the header length (IHL) is the four-character header length, indicating the length of the