Others

Example 1: In this example, the number of subnets is used to divide subnets without considering the number of hosts. A group company has 12 subsidiaries and each subsidiary has 4 Departments. The superior provides a CIDR block of 172.16.0.0/16 for

EtherType: the Ethernet Type field and value EtherType are fields in an ethereframe to indicate the Protocol applied to the frame data field. According to 802.3, the Length/EtherType field is a field of two eight character segments. The meaning of

TCP establishes a three-way handshake for a link. TCP is a link-oriented protocol that serves the application layer, such as FTP and HTTP.TCP uses three handshakes to establish a link.The Header Format of the TCP packet segment is as follows:

Several features of UDP Protocol 1. UDP is a connectionless protocol. The source end of data transmission does not establish a connection with the terminal. when it wants to transmit data, it simply crawls data from the application, and throw it to

Common network devices: repeater, hub, switcher, bridge (bridge) bridge, router, gateway www.2cto.com 1, repeater: working at the underlying layer (Physical Layer) of the OSI reference model, the function is to send large signals in two directions.

1. Devices with large Router-ID have larger MTU1.1 experiment Topology1.2 experiment requirement (1) complete basic IP Address Configuration by topology (2) modify the MTU value of the R1 interface to 1000 bytes (3) Enable OSPF Neighbor Relationship

The OSPF Broadcast Network election experiment topology is as follows:Configure serial port only: On R1: Configure interface 1 (config) # int s1/11 (config-if) # ip add 192.168.1.1 255.255.255.01 (config-if) # no shut www.2cto.com 1 (config-if) #

The IMAP Protocol IMAP (Internet Message Access Protocol) is another protocol that corresponds to POP3. It is a multi-Mailbox email system developed by Stanford University in 1986. It can obtain information about E-mail from the mail server or

Intranet users access the internal server network environment through a public IP Address: Web Portal Server: 192.168.22.8/24, the gateway is 192.168.22.1 Intranet PC network segment: 192.168.X.X/24, and the gateway is 192.168.X.1, the first X

The Cisco name-Based Access Control List, whether it is a standard access control list or an extended access control list, has a drawback. That is, when an ACL rule is set, a problem occurs, you can only delete all the ACL information if you want to

Basic concepts of IPv6 1. Q: What is the difference between the local link address of IPv6 and the local link address of the site? A: The local link address refers to A specific interface. Each interface has global uniqueness (some of which are Mac

An example of the construction of an exchange network is an analysis of the establishment of an enterprise network or campus network. We can divide it into two major parts: one is the resource subnet and the other is the communication subnet.

Layer-Based TCP/IP architecture analysis TCP/IP is a layer-4 architecture. There is an initial OSI Layer-7 architecture in international standards. The OSI concept is clear and the theory is complete, however, it is complex and not practical. OSI is

Classification of Wired NICs 1. According to the bus interface type www.2cto.com according to the NIC bus interface type, we can generally be divided into early ISA interface Nic, PCI interface Nic. At present in the server PCI-X bus interface type

When you set the network adapter hybrid mode, you sometimes need to set the network adapter to the hybrid mode to sniff data on the network. In this mode, data on the network is captured together. So there are many ways to set nic hybrid mode? Run

What is the gateway? What is the role of the host Gateway? Suppose your name is Tom. You live in a big courtyard. Your neighbors have many friends. At the door, there is another Uncle Li who looks at the door. Uncle Li is your gateway. When you want

TCP details: TCP connection termination Question 6: TCP connection termination TCP provides full duplex services for the application layer, meaning that both ends of the connection must be closed when the connection is terminated. The three-way

TCP Header StructureThe TCP packet header structure Transmission Control Protocol (TCP) interfaces up to the user's application process, down to the network layer protocol IP interface. A user application uses TCP (or UDP) to send data over an IP

DHCP principles and packet formatsDynamic Host Configuration Protocol (DHCP) is a Protocol designed by IETF to achieve automatic IP Configuration, it can automatically assign IP addresses, subnet masks, default gateways, DNS Server IP addresses, and

TCP/IP Study Notes: the basic concept of the TCP/IP protocol in the world, a variety of computers run their different operating systems for everyone, these computers use different methods to express the same information. It is as if God in the Bible