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sends datagrams to all hosts on the network (typically a locally connected network), and multicast is the one that sends datagrams to the network. The basic point of these two concepts is that different types of filtering are used when a data frame sent to the previous protocol stack is received. This protocol layer can discard datagrams for different reasons.Th
Computer NetworkIt refers to connecting multiple computers with independent functions and their external devices with different geographical locations through communication lines in the network operating system, A computer system that manages and coordinates network management software and
called private addresses, are not used globally and have only local meaning.Class A private address: 10.0.0.0/8, range is: 10.0.0.0~10.255.255.255Class B Private Address: 172.16.0.0/12, range is: 172.16.0.0~172.31.255.255Class C Private Address: 192.168.0.0/16, range is: 192.168.0.0~192.168.255.255The role of the NAT protocol, DHCP protocol, and DNS protocolNAT Protocol: Network address translation (Nat,network
has split the data link layer of the LAN into two sub-tiers: Logical Link Control LLC (Logical Link Control) sub-layer media access Control MAC (Medium Access Control) child layer. Content related to access to the transport media is placed on the Mac Sublayer, while the LLC Sublayer is independent of the transport media, regardless of which protocol the LAN is transparent to the LLC sublayer Ethernet in the LAN market has achieved a monopoly position, and almost become synonymous with l
to add to the host number of digits.Although the soft examinations will not appear the specific knowledge point, but this kind of calculation will be out.Several rules that make up the network:① the number of address blocks that make up the network must be 2^n (N=1, 2, 3 ...).The address block (②) that makes up the network must be a contiguous block of addresses
The computer network referred to here is Andrew S. tanenbaum's "Computer Networks" fourth edition, which had been roughly read once before, now it's time to study again and take some notes by the way.A computer network is a set of
Command Subnet 166.173.197.131 netmask 255.255.255.192{range 166.173.197.10 166.173.197.107; default-lease-time 600; Max-lease-time 7200; Said （） Assigning 166.173.197.10 networks from 166.173.197.133 to 166.173.197.255 A maximum lease time of two hours Specifies a default lease time of 10 minutes Network Address 166.173.197.0The meaning of the message representation: Subnet 166.173.197.131 (Its subnet
The local area network is most common in each big unit, all boot computers will appear in the unit of the local area network, and everyone has a fixed IP address, and fixed IP address is easy to attack, therefore, there is no way to hide their own computer and IP address in the local area? The answer is yes, yes. Hide your c
Most remote control software can only be used on the LAN or on the public network, otherwise do port mapping. Network people achieve the intranet penetration, do not need to make any settings, you can connect to remote computers through the network, the use of remote computer resources. This is very convenient for Inte
1, the network: by a number of nodes and links to these nodes are composed of the link. Nodes in a network can consist of computers, hubs, switches, or routers.2, the Internet: The network and network can be connected through the router, which constitutes a more coverage of the net
The most direct role of the subnet mask is to determine whether the IP address is within the same network segment as another IP address. Here is a simple look at the basic configuration of IP on a computer IP Address: 192.168.0.5 Subnet Mask: 255.255.255.0 Default gateway: 192.168.0.1 Example above, IP address, subnet mask, default gateway. If the top computer A
Computer Network review: Topic 1. How does the Internet organize its connection structure?1. essential differences between early "networks" and modern networks:Early "network": Host-centricModern Network: group-based exchange network2. The
First, the network protocolA network protocol is a collection of rules, standards, or conventions that are established for data exchange in a computer network. It specifies the format in which information must be used in communication and the meaning of these formats.A network
First, the network protocolA network protocol is a collection of rules, standards, or conventions that are established for data exchange in a computer network. It specifies the format in which information must be used in communication and the meaning of these formats.A network
forged table entries. The switch can only broadcast most of the frames, which can be captured by the sniffer to Switch vs. Router comparisonAdvantages and disadvantages of the switchAdvantages: Pnp With relatively high packet filtering forwarding rates Disadvantages: Large switching networks require large ARP tables on the host and router, which generates considerable ARP traffic and throughput. The switch does not
First, we need to understand the origin of VLAN and why such a technology is generated. This starts with the data exchange in the computer network. At the very beginning, our network was in the wild age. How did we exchange data, that is, simple media sharing, and everyone was connected to a line, then send data to each other, which will inevitably lead to a prob
Overview of Computer Network Basics Chapter 2 Overview 1. Understand the two main functions that computer networks provide to users: connectivity and sharing. 2. In conjunction with "4.2.1 virtual Interconnect Network" (p110), understand that "the Internet is a
1, the use of complex computer password Password-lifting is very effective for simple passwords with fewer lengths. However, if the network user to set a longer password and no obvious characteristics (such as the use of some special characters and the combination of digital letters), then the crack tool to break down the process becomes very difficult, cracked people tend to be poor for a long time to los
Transferred from: http://baike.baidu.com/view/65511.htm Http://baike.baidu.com/view/878.htm The IP address is the network number and host number to represent the host on the network, only in a network number under the computer can be "direct" interoperability, different network
network:1. The number of computers in the network is relatively small, and the number of computers in the general peering network is within ten units, so the peer network is relatively simple. 2. the distribution of peer networks is relatively small, usually in an office or
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