tcp ip ports and protocols

message is used by the host, not the router. During host boot, an ICMP packet of a route request is generally sent to the network, and multiple routers respond to one route notification packet. In addition, the route itself occasionally releases route notification packets in the network. In this way, based on these packets, each host will have the opportunity to establish its own route table for network communication. The router can advertise multiple addresses in a notice and give the priorit

protocolIt is one of the most important protocols in TCP/IP and provides a connectionless data packet transmission mechanism. Its main functions include addressing, route selection, segmentation, and assembly. 1. Disable IP Source Routing The IP protocol allows a host to sp

TCP/IP OverviewTCP/IP is generally considered to be a four-layer protocol: Link layer. Also known as the data Link layer or network interface layer, including device drivers and network interface cards, which work together with the physical interface details of the cable. Network layer. Handles the grouping of activities in the network, such as the r

that is not used as a channel may enable an internal cache for processing requests. The cache effect is that the request/response chain is shortened, and the condition is that one of the participants along the chain has a cache response acting on that request. It indicates the result chain. The condition is that a request is not cached by UA or aplus, and B has a cache copy that passes through a previous response of C from O.Figure 2-3On the Internet, HTTP Communication usually occurs over

use the application-layer protocol.There are many application layer protocols, such as HTTP, FTP, Telnet, etc., and you can define the application layer protocol yourself.The WEB uses the HTTP protocol as an application-layer protocol to encapsulate HTTP text information and then send it to the network using TCP/IP as the Transport layer protocol. ”and what we u

message is used by the host, not the router. During host boot, an ICMP packet of a route request is generally sent to the network, and multiple routers respond to one route notification packet. In addition, the route itself occasionally releases route notification packets in the network. In this way, based on these packets, each host will have the opportunity to establish its own route table for network communication. The router can advertise multiple addresses in a notice and give the priorit

TCP/IP Note 2. Network Layer (1) -- IP, subnet, CIDR1. IP1.1 supporting agreementIP is one of the two most important protocols in the TCP/IP system.There are also four protocols used in

, then numbering each IP packet, ensuring that the other party receives it sequentially, and automatically re-sends if the package is lost. 8) Many of the more advanced protocols are based on the TCP protocol, such as the HTTP protocol for the browser, the SMTP protocol for sending mail, and so on. 9) A TCP m

Memcache installation is very simple, by default, anyone can access the cached data on the server, so it is very insecure if not processed (there are many issues related to this in the dark cloud)1. First make sure that the firewall on the server is open2. Set allow Memcache to pass through the firewall"Allow programs or features through Windows Firewall" = "Allow another program to run" = "Browse" to select the downloaded Memcache.exe3. Set inbound rules (that is, set accessible

Programming via Java Network (1) network architecture and communication Protocols I know that the IP protocol corresponds to the network layer, the TCP protocol corresponds to the transport layer, and the HTTP protocol corresponds to the application layer,The three are inherently not comparable The TPC/IP prot

TCP/IP protocol three-way handshake and four-way handshake (establish connection and disconnect), tcpip 1. TCP/IP protocol Overview The TCP/IP Protocol (TransmissionControl Protocol/Internet Protocol) is also called the transmissi

. So the traceroute just fills this flaw.The principle of traceroute is very very interesting, it receives the IP of the destination host, first sends a ttl=1 to the destination host (remember what TTL is?). UDP (the next to know what UDP is the packet), and after the first router receives the packet, the TTL is automatically reduced by 1, and the TTL becomes 0, the router will discard the packet, and at the same time produce a host unreachable ICMP d

).3; After the transfer is over, the port connection is no longer used with an improved three-time handshake.19: How is the UDP packet, TCP packet size confirmed? Both TCP and UDP packets need to be delivered to the Internet layer encapsulated as IP packets, and an IP packet with a length of 16 bi

users accessing information from various sites in the world, and the network layer is the layer for managing such connections. (FLAG: Route Selection, IP/OSPF, ICMP, IGMP) 4. transmission Layer: defines some data transmission protocols and port numbers (WWW port 80, etc.), such as TCP (transmission control protocol, low transmission efficiency, high reliability,

protocols for Networking program code.TCP/IP protocolThe TCP/IP network protocol stack is divided into the application layer (application), the Transport Layer (TRANSPORT), the network layer (networks) and the link layer (link) four layer. As shown, if not specifically stated, the general quoted figure is from the "

TCP will not cause IP sharding, while UDP and ICMP will cause IP sharding. Why does TCP not cause IP sharding? The reason is that TCP itself supports segmentation: when TCP needs to tra

TCP/IP protocol ----- excellent notes, tcpip protocol -----1. Introduction The TCP/IP Protocol is not a single TCP Protocol or an IP Protocol. It is a group of protocols, including

What is the TCP/IP protocol. first, the TCP/IP model The TCP/IP protocol model (transmission Control protocol/internet Protocol) contains a series of network protocols that form the ba

text information and then send it to the network using TCP/IP as the Transport layer protocol. ”And we usually say the most socket is what, in fact, the socket is the TCP/IP protocol encapsulation, the socket itself is not a protocol, but a call interface (API), through the socket, we can use the

First look at the chart below to try to show the location of different TCP/IP and other protocols in the original OSI model 7 Application Layer such as HTTP, SMTP, SNMP, FTP, Telnet, SIP, SSH, NFS, RTSP, XMPP, Whois, ENRP 6 Presentation Layer such as XDR, ASN.1, SMB, AFP, NCP 5