network protocol testing

Last time, we introduced the BOOTP protocol for the diskless workstation to automatically obtain the IP address, the TFTP protocol for simple file transfer, and the DHCP protocol for automatically allocating IP addresses. In this section, we will introduce Internet Control Message Protocol (ICMP), Internet Group Manage

message sender sent the same message.TCP and UDP are common means of communication and play different roles under certain conditions. Specifically, the differences between TCP and UDP are mainly expressed in the following areas:(1) TCP is a connection-oriented Transmission Control protocol, and UDP provides a non-connected datagram service.(2) TCP has high reliability, ensure the correctness of transmission data, no loss or disorderly sequence; UDP d

, the campus network is believed that most people have used, in the campus network settings There is a 255.255.255.0 thing, this is the subnet mask. The subnet mask is a binary number sequence of 32bit, in the form of a series of 1 and a series of 0, for example: 255.255.255.0 (binary is 11111111.11111111.11111111.00000000) for the B-class address just now, Because 210.30 is the

Internet friends should be very familiar with what is an IP address, whether it is set to log on to the Internet, or LAN Settings, more or less access to the IP address. In fact, IP itself is a network protocol, and currently we commonly use IP protocol strictly speaking as IPv4. The following describes the IP, IPv6, TCP, and TCP/IP protocols.IP protocolDescripti

Performance of network protocolsNow it's our turn to actually control things.The performance of network processing is not proportional to the addition of delay time.This is because the intrinsic operation of most network protocols is bidirectional information exchange.The remainder of this chapter focuses on understanding why these exchanges of information are ge

IP Control Protocol The IP protocol is only responsible for transmitting IP packets and cannot detect and control problems in the network. These tasks are completed through the Internet control protocol. ICMP (Internet Control Message Protocol) (1) The IP

Poly-low coupling: High cohesion: Each module functions as single as possible, does not have multiple function doping Low coupling: Minimizing the correlation between each module Network protocol: The rules that must be complied with in the network communication, such as what connection is established, how message structure is pars

mode. Related Common Management Information Service (CMIS) defines methods for receiving status information from network objects, devices, and devices. Connection-oriented Protocol/Connectionless Protocol The protocol used by the two computers to establish a physical connection in the Wide Area

frames. You may need to install a switch, bridge, or router to separate the network into small enough subnets to support the traffic load. Run Network statistics (network Stats) test and check for errors (other than collisions). If an error occurs, run the error statistics (Stats) test and Zoom in (Zoom) to understand the MAC address of the problematic site, an

measurement. Passive measurement refers to the use of specific testing tools to collect specific information about activities in the network, including vrouters, switches, servers, and other network devices, measure the network performance and functions. Common passive measurement methods include reading the relevant

acceptance standard. The network performance analysis and evaluation are conducted at the end of network installation and deployment, it also evaluates the performance of basic network application services. It is also used for network performance tests before network upgrad

BOOTP protocol(Bootstrap Protocol) is a TCP/IP-based Protocol that allows diskless sites to obtain IP addresses from a central server, assign a dynamic IP address to the diskless workstation in the LAN. You do not need to set a static IP address for each user. When using the BOOTP Protocol, it generally includes Bootst

Network Protocol Model Analysis Network Protocol designers should not design a single, huge protocol to complete the details of all forms of communication regulations, but should divide the communication problems into multiple small problems, then a separate

generally check in this order:1) are various devices normal,2) whether the wiring is correct and in good condition;3) whether the configuration of various devices is correct.In general, these factors have very few problems, but it is necessary to carefully check these factors. After confirmation, pay attention to the following points:1) Use a testing software for testing, which can narrow down the scope of