ip internet protocol

TCP/IP protocol (Transmission control protocol/internet Protocol Transmission Control Protocol/Internet Interconnection Protocol) TCP/

1. the TCP (Transmission Control Protocol)/IP (Internet Protocol) protocol family is a network communication model and an entire network transmission protocol family. It is the basic communication architecture of the

IP address routing and dynamic routing protocol (6) Routing is one of the most important functions of IP addresses. The selected data packets can be generated by a local host or another host. In one case, the host must be configured as a router. Otherwise, the datagram obtained through the network interface will be discarded If the destination address is not the

ping uses an ICMP echo request and a loopback reply message; Ping is an example of the use of the network layer ICMP directly by the application layer;(2) Another very useful application is traceroute: used to track a packet from the source to the end of the path; Traceroute sends a series of IP datagrams from the source host to the destination, and the datagram encapsulates the undelivered UDP user data; The time-to-live TTL of the first datagram is

This morning, the computer of my colleague sitting next to me broke down and went online without going to the Internet. I got the IT department to repair it. The answer I got was that I needed to redo the system. Recently, the IT department (especially the desktop group) has not handled many problems, so I took the initiative to help him see the situation and finally solved the problem. We hereby record the solution process and methods in case of the

ICMP (Internet Control Packet Protocol) To forward IP data packets more effectively and improve the chances of successful delivery, the network layer uses the Internet Control Packet protocol ICMP. ICMP acts as the IP datagram da

6th. TCP/IP routing protocol fault handlingFirst, the default gatewayWhen the destination address of the package is not in the router's routing table, such as when the router is configured with a default gateway, it is forwarded to the default gateway or discarded.show IP route; View the default gateway for Cisco routersSecond, static and dynamic routingThird, pr

mask of the destination network to distinguish it from the broadcast address that points to the network. The subnet number pointing to the broadcast address of all subnets and the host number is all 1. For example, if the destination subnet mask is 2 5. 2 5 5. 2 5 5. 0, so I P address 1 2 8. 1. 2 5 5. 2 5 is a broadcast address pointing to all subnets. However, if the network is not divided into subnets, It is a broadcast pointing to the network.3. MulticastFigure 1 2-2 shows the format of clas

Some campus network or unit network of each IP address and MAC address is bound, if a computer can not access the Internet, only to modify the MAC address before the Internet. So how do you modify the MAC address in the WIN8 system? How do you want to install the protocol? The following small series to share with you t

ICMP Port unreachable authentication. 1. Preparationwindow to download the TFTP32 software and set the IP address of the server (window system IP ), and shut down windows firewall. As shown in the following:2,Ubuntu virtual machine, install tftp service, and install wireshark.sudo apt-get install TFTP3.Open Wireshark.Start the TFTP service and connect to window, Specify the 8000 port, this port number is

TCP/IP protocol cluster BASICS (1) network interface layer: the basic layer of the model, responsible for sending and receiving data frames (frame is an independent network information transmission unit ). The Network Interface Layer places frame data on the network or retrieves frames from the network. (2) network layer: encapsulate data into IP data packets, an

I. PrefaceAt present, the speed of network development is very fast, and more people are learning the network. People with a little knowledge about the network know it.TCP/IPThe Protocol is the basis of the network and the language of the Internet.TCP/IPThe Protocol has no Internet today. At present, there are a lot of people who are known to be engaged in the

follows:Telnet: provides remote login terminal simulation) service, as if the older BBS is used for this login.FTP: provides application-level file transfer services, which are simple and clear: Remote File Access and other services;SMTP: The E-mail protocol used every day.TFTP: provides a small and simple File Transfer Service. In fact, from a certain perspective, it is a replacement for FTP when the file is very small and only needs to be transferr

 I. ARP and RARPNetwork transmission, according to the destination IP address through the route selection can be transmitted over the Internet, but if you do not know the destination interface, then you do not know the packet to a network or a subnet which host. ARP (Address Resolution Protocol) can be based on the destination

ARP: Address Resolution Protocol When a host sends an Ethernet data frame to another host located on the same LAN, the destination interface is determined based on the 48-bit ethernet address. Device DriverProgramNever check the destination IP address in the IP datagram. The IP address resolved to a 32-bit

Turn from: http://www.cnblogs.com/ggjucheng/archive/2012/02/02/2335495.html Preface Although the network programming socket many people will operate, but many still are not familiar with the socket programming, the low-level TCP/IP protocol interaction process, this article will a simple client program and the service side program interaction process, uses tcpdump grasping the package, the example explains

Internet Group Management Protocol) No matter how many routing protocols are running on the multicast internet, IGMP must be run between the host and the router. IGMP must be run on all routers of multicast hosts that want to join multicast groups and subnets connected to all interfaces. This protocol is similar to ICM

To the new company after the computer to re-install the operating system, from XP replaced by Win7, installed after the system needs to configure IP to network.Before setting the IP to determine the computer card driver has been installed, otherwise there is no way to carry out the following steps.1. Open the Control Panel (note "View mode" is "category"), click "View network Status and Tasks" under "Networ

1. Default Gateway If the destination address of the package is not in the router routing table, if the router is configured with the default gateway, it will be forwarded to the default gateway; otherwise, it will be discarded. Show IP route; view the default gateway of a Cisco Router Ii. Static and Dynamic Routing Iii. Handling k_protocal/04937.htm" target = "_ blank"> rip faultsRip is the distance vector routing

Repost TCP/IP protocol simple analysis First, TCP/IP and IP are two different protocols. They are divided into different layers in the layer-7 network model. IP is the network layer protocol, and TCP is the transport layer