Question 2: What is the Internet address? Internet is a network composed of computers that communicate with each other using a common language, that is, wide area network, local area network and international computer network composed of personal computers according to certain communication protocols. Simply put, the Internet is a kind of network, just like cars, such as Mercedes-Benz and BMW, so we can't know what its specific website is.
Question 3: What website is better for ie browser home page? Hao 123 This is the best website in the encyclopedia.
Question 4: Internet addresses have some expressions! Because the e-mail address is also the network address @ followed by the domain name. ...
This question is actually not accurate enough. ...
Question 5: What's the difference between an 5:IP address and a web address? IP address is the unified address identifier of the whole Internet, and its purpose is to shield the physical network details and make the Internet logically a whole network. In the actual physical transmission, the IP address must be translated into the physical address of the network card first, so the IP address is a logical address.
The definition of IP address, in addition to the difference between the network number and host number of Class A, Class B and Class C, also includes some fixed special addresses for some special purposes. If all IP addresses with host number 1 are used for network broadcasting, and 255.255.255.255 is used for limited broadcasting of this network, 0.0.0 is interpreted as this network. If the host tries to communicate in this network and does not know the network number of this network, 0 can be used as this address. Moreover, TCP/IP stipulates that the network address 127 is a reserved address, which is used for network software testing and inter-process communication of local computers, and is called delivery address. The packet with the network number 127 cannot appear on any network, and the host and gateway cannot broadcast any routing information of this address.
IP protocol address is a way to identify computers connected to the Internet. It has *** 12 digits and can be represented by four decimal digits. Each number ranges from 0 to 255, and each decimal number is separated by a symbol (for example, 255.255.255.0). Every computer connected to the Internet has an absolutely unique and non-repetitive IP address, so it is easy for us to find the information we want to access among thousands of computers on the Internet through the IP address.
The domain name provides an intuitive host identifier. TCP/IP specially designed a character-based host name mechanism, which is the domain name system. Its purpose is to facilitate users to use the Internet and adopt hierarchical management. In the Internet, the typical TCP/IP hierarchical hostname syntax is as follows:
Local. Group. Site
Where local stands for local name, group stands for management group name, and site stands for network name. The parts (sub-names) of a name are separated by dots. For example, the domain name mail.tsinghua. tsinghua.edu represents Tsinghua University's mail server in China Education Network, Tsinghua University in China Education Network, and edu represents China Education Network and China. Therefore, the domain name address can be simply understood as an intuitive IP address.
Because IP address as a four-segment number is too abstract and difficult to remember, it is necessary to use a more memorable system. It's like remembering a person's name easily, but remembering his ID number is relatively more troublesome. According to this situation, another set of new rules has been formulated on the internet, that is, the domain name system which is easy to remember is adopted to define the internet computer.
The fundamental motivation of domain name is convenient management. The original mapping between the host name and the IP address is saved in the NIC's hosts.txt file. At that time, because of the small number of hosts, this file did not change frequently, so other hosts only downloaded this file from NIC hosts every few days to map host names and IP addresses. However, with the development of the network, this method can no longer be used, because there are often hosts requesting downloads, which puts great pressure on NIC hosts and cannot guarantee the quality of service. Many LAN users want to manage their own host names instead of waiting for NIC to add their host names to the hosts.txt file for many days. Some organizations also want to have their own namespace configuration. Is the need for a simple management method. Finally, we decided to use a hierarchical namespace organization scheme. As a standard for dividing different levels. The entire namespace is managed by a distributed database. Please don't mix ordinary domain names with the domain name system here before reading. The best way is to forget the original concept and look at the new things now.
The setting target of DNS affects its structure. The main goal is to provide a consistent namespace for resources. In order to avoid problems caused by different codes, it is necessary to include network labels. & gt
Question 6: What is the address of the Internet? As long as the Internet is the first website, it belongs to the Internet.
Question 7: What is the address of the Internet homepage? blank page
Question 8: What is the Internet address? 1, Internet address.
Internet address means IP address, which is the abbreviation of IP address. IP address is a unified address format provided by IP protocol, which assigns a logical address to each network and each host on the Internet to shield the difference of physical addresses. At present, there are some ip proxy software, but most of them are charged.
2. Intellectual property rights
IP is the abbreviation of English Internet Protocol, which means "protocol for interconnection between networks", that is, a protocol designed for computer networks to communicate with each other. In the internet, it is a set of rules that can make all computer networks connected with the internet communicate with each other, and stipulates the rules that computers should abide by when communicating on the internet. As long as it conforms to the IP protocol, any computer system produced by any manufacturer can be interconnected with the Internet. It is precisely because of the IP protocol that the Internet has rapidly developed into the largest and most open computer communication network in the world. Therefore, IP protocol can also be called "Internet protocol".
3. Internet address of the Internet.
An IP address is used to assign a number to a computer on the Internet. What we see every day is that every networked PC needs an IP address to communicate normally. We can compare "personal computer" to "a telephone", then "IP address" is equivalent to "telephone number", and the router in the Internet is equivalent to "program-controlled switch" of telecommunication bureau.
An IP address is a 32-bit binary number, which is usually divided into four "8-bit binary numbers" (four bytes). IP addresses are usually expressed as (a, b, c, d) in dotted decimal form, where a, b, c and d are decimal integers between 0 and 255. Example: dotted decimal IP address (100.4.5.6) is actually a 32-bit binary number (01001000100.00000038+0065438+.
IP address (English: Internet Protocol Address) is a way to address hosts on the Internet, also known as Internet Protocol Address. Common IP addresses can be divided into IPv4 and IPv6.
4.IP address addressing scheme
The IP address addressing scheme divides the IP address space into five categories: A, B, C, D and E, in which A, B and C are the basic categories, and D and E are used for multicast and reservation.
IPV4 has four numbers, and each number does not exceed 255. Due to the vigorous development of the Internet, the demand for IP addresses is increasing, which makes the allocation of IP addresses more and more strict. Various data show that all global IPv4 addresses may be allocated from 2005 to 20 10 (in fact, the allocation of IPv4 addresses was completed on February 3, 201year).
The lack of address space will definitely hinder the further development of the Internet. In order to expand the address space, it is suggested to redefine the address space through IPv6. IPv6 uses an address length of 128 bits.
Question 9: Internet addresses can be divided into three categories: A, B and C. What are these three categories and what are they respectively? Definition of IP protocol, classification and characteristics of IP address
What is IP protocol, how to express IP address, how to divide it into several categories, and what are their characteristics?
In order to facilitate addressing and hierarchical network construction, IP addresses are divided into five categories: A, B, C, D and E. Enterprises should
Only three categories, A, B and C, are used.
IP protocol, also known as Internet protocol, is a datagram protocol that supports the interconnection between networks.
Together with TCP protocol (transmission control protocol), it constitutes the core of TCP/IP protocol family. It provides the end of the internet connection.
Very good functions, including IP datagram IP address format within the scope of the Internet.
On the Internet, in order to realize communication between nodes connected to the Internet,
Each node (computer connected to the network) must be assigned an address, and this address should be guaranteed to be unique in the whole network.
This is the IP address.
The current IP address (IPv4: IP version 4) is represented by 32 binary digits, and each 8-bit binary digit is an integer.
Separated by decimal points, such as 159.226.4 1.98, the whole IP address room has four groups of 8-bit binary numbers.
By indicating the address of the network where the host is located (similar to the number of troops) and the identification of the host in the network (similar to soldiers)
In quantity) * *.
In order to facilitate addressing and hierarchical network construction, IP addresses are divided into five categories: A, B, C, D and E,
Only a, b and c are used in commercial applications.
* Class A address: The network identification of Class A address is represented by the first set of 8-bit binary numbers.
The host identification in the network accounts for 3 groups of 8-bit binary numbers,
The characteristic of Class A address is that the first binary number of network identification must be "0".
It is not difficult to calculate that Class A addresses allow 126 network segments, and each network allows about16.7 million hosts, which are usually assigned to servers.
A network (such as a backbone) with a large number of hosts.
* Class B address: The network identification of Class B address is represented by the first two groups of 8-bit binary numbers.
The host identification in the network accounts for two groups of 8-bit binary numbers,
The characteristic of Class B address is that the first two binary digits of network identification must be "10".
Class B addresses allow 16384 network segments, and each network allows 65533 hosts, which is suitable for networks with more nodes.
(e.g. local area network).
* Class C address: The network identification of Class C address is represented by the first three groups of 8-bit binary numbers.
Host identification in the network accounts for 1 group 8-bit binary number,
The characteristic of Class C address is that the first 3 digits of network identification must be "1 10".
The network with Class C address allows 254 hosts, which is suitable for networks with fewer nodes (such as campus networks).
In order to facilitate memory, it is customary to use four decimal digits to represent an IP address.
Decimal numbers are separated by periods.
This IP address representation is also called dotted decimal system. As shown in this way,
The IP address range of Class A network is1.0.1-127.255.255.254;
The IP address range of Class B network is:128.1.0.1-kloc-0/91.255.254;
The IP address range of Class C network is:192.0.1.1-223.255.255.254.
Because of the shortage of network address and the relative surplus of host address, subnet mask is used to specify the network segment number.
TCP/IP protocol has nothing to do with the lower data link layer and physical layer, which is also an important feature of TCP/IP. Positive reasons
Therefore, it can widely support the physical network structure composed of lower two-layer protocols. Currently, TCP/IP connection has been used.
Divided into intercontinental networks, national networks and cross-regional networks. ...& gt& gt
Question 10: What is the address of the Internet? Nic China Internet Management Center icann Internet Domain Name and Address Management Company ICANN refers to/kloc-0 "Internet Domain Name and Address Management Company" established in September, 1998, which is the highest management organization of the global Internet.
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Introduction to calligraphy, writing posture, writing method.
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