What is the difference between a router and a network card?

What is the difference between a router and a wireless network card?

The difference between a router and a wireless network card is as follows:

1. Router, also known as gateway, is used to connect multiple logically separated networks. The so-called logical network represents a single network or subnet. When data is transmitted from one subnet to another, it can be done through the routing function of the router. Therefore, the router has the function of judging the network address and selecting the IP path. It can establish flexible connection in multi-network interconnection environment, and can connect all kinds of subnets with completely different data grouping and media access methods. The router only accepts information from the source station or other routers, and belongs to an interconnected device in the network layer.

2. The network card is a network component working at the link layer, and it is an interface connecting computers and transmission media in the local area network. It can not only realize the physical connection and electrical signal matching with transmission media in LAN, but also involve the functions of sending and receiving frames, encapsulating and unpacking frames, media access control, data encoding and decoding, data caching and so on.

3. The wireless network card is the equipment of the terminal wireless network, which uses wireless signals for data transmission, and does not need wired connection.

4. The router is an interconnection device in the network layer, and the wireless network card is a data transmission terminal without wired connection.

Network card and router are two kinds of network hardware devices. Network card is the interface device between network terminal and network; Routers are used to guide the transmission of information in the network.

Router is the key equipment to realize the inter-network connection in the network. As the hub of interconnection between different networks, router system constitutes the main line of Internet based on TCP/IP.

The router plays a key role in the Internet because it is at the network layer. On the one hand, it can span different physical network types (DDN, FDDI, Ethernet, etc. ), on the other hand, logically divide the whole internet into logically independent network units, so that the network has a certain logical structure. The main job of the router is to find the best transmission path for each data frame passing through the router and effectively transmit the data to the destination.

The basic function of a router is to transmit data (IP packets) to the correct network, which includes: 1, IP datagram forwarding, including datagram routing and transmission; 2. Subnet isolation suppresses broadcast storms; 3. Maintain the routing table and exchange routing information with other routers, which is the basis of IP message forwarding; 4. Error handling and simple congestion control of 4.IP datagram; 5. Implement the filtering and accounting of IP datagram.

Routers form the backbone of the Internet. Its processing speed is one of the main bottlenecks of network communication, and its reliability directly affects the quality of network interconnection. Therefore, router technology has always been in the core position in the field of Internet research.

What is the difference between a wireless router and a wireless network card?

1, different application scenarios

Wireless network cards are mainly used for wireless Internet access in mobile scenes (for example, laptops can access the Internet during the whole moving process by car); Wireless router is more suitable for wireless Internet access in fixed scenes (for example, SOHO wireless router at home, notebook is connected to wireless router through built-in wireless network card, which is only applicable to the range covered by wireless router signal);

2. Different shapes and sizes

Wireless network cards are generally made in the form of USB interface, only the size of a U disk; The wireless router is a device in appearance, which is of course much larger than the wireless network card.

3. Different power modes

Wireless network cards are generally powered by USB; The wireless router is powered by an external power supply and converted by an adapter;

4. Different access networks

The wireless network card is accessed through the cellular wireless access network of the operator; The wireless router is accessed through the operator's wired network access network (such as ADSL, LAN, PON, etc.). ) and extends wirelessly only at the terminal side;

5. Access points (APN, SSID) are different.

The wireless network card is accessed through the public APN of the operator, such as CMNET of China Mobile and UNINET of China Unicom, and the APN name cannot be modified; The wireless router is identified by SSID, and the SSID name can be modified at any time according to your own preferences;

6. Wireless air interface technology is different.

Wireless network cards are accessed through wireless air interface technology of operators, such as mobile 4G.

TD-LTE, China Unicom and Telecom's 4G

FDD-LTE； Wireless router through IEEE.

802. 1 1a/b/g wireless air interface technology for access;

7. The richness of functions is different.

Wireless network cards generally only do dial-up access, and their functions are relatively simple; Wireless router can provide NAT, QoS, DHCP and other technologies, with more comprehensive functions;

8. Different charging methods

Wireless network cards are charged according to traffic or duration, which is relatively expensive; Wireless routers are generally connected through broadband networks, and they are charged by monthly or annual subscription. In the context of fierce competition among several operators, it can be said that it is the price of cabbage.

What is the difference between a wireless network card and a wireless router?

First, the subject is different.

1, wireless network card: It is a terminal wireless network device that needs to be connected to the Internet through a wireless connection network under the wireless coverage of a wireless local area network.

2. Wireless router: It can be regarded as a repeater, which forwards the broadband network signal connected to the home wall to the nearby wireless network equipment through the antenna.

Second, the characteristics are different.

1, wireless network card: used to connect local area network. It is just a signal transceiver. Only when you find the exit to the Internet can you connect to the Internet. All wireless network cards can only be limited to the range of deployed wireless LAN.

2. Wireless router: It has all the functions of a simple wireless AP, such as supporting DHCP client, VPN, firewall and WEP encryption. , including network address translation (NAT) function.

Third, the protocol standards are different.

1, wireless network card: supports IEEE 802. 1 1 standard.

2. Wireless router: The mainstream protocol standard supported is IEEE802. 1 1n, which is backward compatible with 802. 1 1g, 802.1/b.

Baidu Encyclopedia-Wireless Router

Baidu encyclopedia-wireless network card

What is the difference between a wireless router and a wireless network card?

1. Wireless router is a router with wireless coverage function, which is used for users to surf the Internet. A wireless router can be regarded as a repeater, which forwards broadband network signals connected to the home wall to nearby wireless network devices (laptops, mobile phones supporting wifi) through an antenna. And all devices with WIFI function).

2. The wireless network card is a device of the terminal wireless network, and it is a terminal that uses wireless signals for data transmission without wired connection. According to different interfaces, wireless network cards mainly include PCMCIA wireless network cards, PCI wireless network cards, MiniPCI wireless network cards, USB wireless network cards and CF/SD wireless network cards.

3. The wireless router is a wireless transmitter, which solves the problem that multiple wireless terminals need to surf the Internet at the same time. The wireless network card is a wireless receiver, which can receive the wireless signals sent by the wireless router.

The difference between network card and router

The difference between this network card and the router is that I specially arranged it for you, hoping to help you!

There is a big difference between the two, and the only connection is the network cable between them.

The network card works in the physical layer and the router works in the network layer.

Network cards are used to connect routes, just like the difference between mobile phones and base stations. The network card is on your computer. You can connect to the router through the network card. Routing is used to connect to the external network, and only by connecting to the external network can you access the Internet. . Computer (Network Card)-Routing-Internet Access.

One is a receiver and the other is a transmitter.

A network card is installed in the computer! It is the most basic layer for computers to connect to the network! With a network card, you can surf the Internet.

Routers are tools for connecting network cards, that is, computers and computers! With a router, you can build a local area network, and multiple computers can surf the Internet with one account! !

Therefore, the network card is the foundation, and the router is the bridge connecting the network card!

Wireless is better, and now the general wireless routing is more intelligent and does not need to be set up. The specific steps are roughly as follows:

1. Plug the cat's network cable into the router's WAN port and the desktop's network cable into the router's LAN port.

2. Look at the label on the back of the router. There is the access address, user name and password of the router. If the router doesn't have this information, it must be in the manual.

3. Open a browser on the desktop, enter the access address of the router, and then enter the user name and password to log in to the router.

4. Select pppoe Internet access mode in the wan settings of the router, and then enter your dial-up user name and password.

5. Turn on the wireless function in the wireless settings and set the connection password.

6. Turn on the mobile phone wifi, connect the router, and enter the connection password. At this time, both the mobile phone and the desktop can access the Internet.