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7. application Layer: it is mainly used for application software to provide interface azoles so that the application can use network services. 6. houses: 1> data decoding and encoding; 2> data encryption and decryption; 3> data compression and

I believe you have heard of the word "TCP/IP", which seems to be everywhere and always jumps out in front of you. What does TCP/IP mean? TCP/IP is actually a combination of two basic network protocols: IP protocol and TCP protocol name. Let's take a

Commonly used Wan protocols common Wan protocols include: HDLC: Advanced Data Link Control, ISO standard link layer protocol; LAPB: balanced link access procedure, enhanced error detection and correction; www.2cto.com PPP: point-to-Point Protocol,

Workstation, a common network name, can be said to be a Workstation for any machine that can provide input to the network environment. Its main definition element is "input ". This can include personal computers, hand-held scanners, terminals, and

Subnet and supernetwork Analysis★Subnet subnet mask is a technology used in combination with IP addresses. It must be used together with the IP address. The subnet mask has only one function, namely dividing an IP address into a network address and

This title is too big to be written, but I am afraid to forget it. Simply remember a bit and let's talk about the whole process of DNS resolution. The DNS resolution process is like this. First, we request the DNS server we entered. The server first

To understand why TCP requires a three-way handshake (vernacular), first of all, let's briefly introduce TCP three-way handshake www.2cto.com. In TCP/IP, TCP provides reliable connection services and uses three-way handshake to establish a

In the LAN technology based on the conflict domain and broadcast domain LAN technology, the conflict domain and broadcast domain have a great impact on network performance, let's take a look at how these two words affect network performance.

TCP: The Transmission Control Protocol (TCP) provides the connection between the client and the server. A TCP client establishes a connection to a given server, exchanges data with that server across the connection, and then terminates the

Tcp persistent connections and retention time are divided into persistent connections and short connections. The short connection will be disconnected after the packet is sent. After the long connection is sent, the connection will be maintained

Chapter 1 _ overview of network protocols are generally divided into different layers for development. TCP/IP is generally considered to have four layers, from top to bottom: Application Layer: processing applications, common TCP/IP applications

Chapter 2 _ three purposes of The Link Layer of network protocol: sending and receiving IP datagram for the IP module, sending ARP requests for the ARP module, and receiving ARP responses; sends RARP requests to RARP and receives RARP responses.

The local address proxy and NAT hosting questions in this article are somewhat suspicious and some are incomprehensible! However, if I say a simple and basic principle, you will not be confused, that is, the address of your outer router's Internet

Private vlan: A private vlan is a private vlan. After the vlan is configured, the host with the same vlan can be isolated to enhance network security. The private vlan consists of the primary vlan, isolated vlan, and community vlan. The primary vlan

VPN Virtual Private Network (VPN) refers to the technology for establishing a Private Network on a public Network. It is called virtual network, mainly because the connection between any two nodes of the VPN network does not have the end-to-end

Static NAT, Dynamic NAT, and PAT (Port multiplexing) configurations NAT can be implemented in three ways: Static translation Static Nat, Dynamic Conversion Dynamic Nat, and port multiplexing OverLoad. Static Nat refers to converting private IP

Self-anti-ACL Configuration requirement: RA is the company's border router. Only Intranet users are allowed to actively access the TCP traffic of the Internet. All traffic of the Internet to access the Intranet is rejected: in the Inbound direction

Network Layer Concept Learning (basic concepts, routers, and routing algorithms) the network layer is built on the Link Layer. Its main function is to enable communication between hosts in the network. In the Internet, the IP layer is the most core

The various "networks" that I am struggling with have always thought that my home ADSL Broadband Internet access (that is, using telephone lines) is Ethernet. In fact, this is a WAN Based on the ppp protocol, today I am looking for explanations from

TCP/IP learning ---- IP datagram format the format of IP datagram is as follows (Here we only discuss IPv4) IP datagram format version 4B header length 4B service type (TOS) 8B total length (number of bytes) 16B flag 16 mark 3B offset 13B survival