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To put it simply, a router is a network device that connects multiple networks or network segments, which can "translate" the data information between different networks or network segments, so that they can "read" each other's data, thus forming a larger network.
There are two typical functions of a router, namely the data channel function and the control function. The data channel functions include ** decision, backplane ** and output link scheduling, etc., which are generally completed by specific hardware; Control functions are generally implemented by software, including information exchange with neighboring routers, system configuration, system management, etc.
It can be said that the current router already includes the function of the switch, but the router has more functions, and the general routing function is used, which inevitably makes the CPU and memory of the router feel difficult, of course, a good route is not a problem.
I think that as long as a few of your computers share the Internet, the general home router is enough to deal with it, and there is no need to add a switch. The network speed is slow, because Thunderbolt, BT, etc. are turned on, and the resource traffic is almost exhausted, and the Internet access of another computer is bound to be slow, which has nothing to do with the device. If you want to balance the traffic, you can use the routing function to limit the uplink and downlink speeds.
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First of all, you have to understand a concept! A router and a switch are not the same thing! It can be used as a switch under the router settings!
But the switch doesn't have the router to assign an IP address! It depends on whether there is a router at the end of the room that enters your dormitory, and if it enters your bedroom, there is a network cable with routing function! Then use a switch or a hub!
If it's just a ** line or a broadband network cable! Then you have to use a router!
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The differences are as follows:
1. The address is different.
The traditional switch is developed from the electric bridge, according to the MAC address, the approach is selected through the station meter, and the station meter is automatically established and maintained by the turnout. Routers belong to the third layer of OSI network equipment. It is addressed based on IP addresses and is generated by the routing table protocol.
2. Different properties.
Switches are mainly used to complete the network interconnection and link protocols of the same or similar physical media, without rushing to make link connections between physical layers. Routers are primarily used for interconnection between different networks, so they can connect the network with physical media, link layer protocols, and network layer protocols.
3. The use environment is different.
The application environment of the switch is relatively simple, mainly a simple local area network. Routers can be applied to any network, whether it is a LAN or a WAN, and its advantage lies in selecting the best route, load sharing, link backup, and other networks to exchange routing information.
4. Different levels of work.
The switch works at the data link layer, which is the second layer, of the OSI RM Open Architecture. The principle of operation is relatively simple. At the beginning of the router planning work, in the network layer of the OSI model, the router works in the third layer (network layer) of the OSI, more protocol information can be obtained, and the router can make more intelligent decisions.
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The main role of the router:
One is to connect the LAN and the WAN, that is, to connect the large network and the small network.
The other is the data processing capacity, what group filtering, **, encryption, compression, etc. IP can be restricted, and there is a firewall function.
Another is the function of traffic monitoring and control, and the router can limit the speed.
The main role of the switch:
The main functions of the switch include physical addressing, network topology, error checking, frame sequence, and flow control. At present, the switch also has some new functions, such as support for VLAN (virtual local area network), support for link aggregation, and even firewall function.
Routers are compared to Layer 1 and Layer 2 switches.
The router is relatively powerful, and the speed is not as fast as the switch.
Routers vs. Layer 3 switches.
The switch is more powerful than the router and the speed is also faster than the router. The network protocols they are based on are completely different.
Now the network is basically connected to the use of switches, such as 10m bandwidth, connected to 5 computers, connected with switches, each computer gets 10m bandwidth, only when the hub is also called the hub, there is a problem of speed distribution, with the hub is the average distribution of bandwidth, or the above example, with the hub connection, then the speed of each computer is only 2m
Of course, in the case of home, it is not cost-effective to buy a switch, which is why so many people buy routers.
Is it for personal or business use?
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