How many ports does an IP address have on a host

A host has several IPs, which is not necessarily and conditional. Here's why:

1. Correct it first. The host does not have an IP address parameter, but the NIC device has an IP parameter. That is, the number of IPs is related to how many network cards are installed on a host;

2. Give examples. In a host, there is a wired network card integrated with the motherboard, and another wireless network card is installed, and the Internet access parameters are set after installing the driver. After detecting normal Internet access, check the configuration parameters as shown in the following figure

Fig. 1. This is the IP of the wireless network card;

Fig. 2. This is the IP of the wired network card;

3. If multiple network cards are installed on one host, and different external network entrances are used respectively (such as Internet cafes, which use China Unicom, China Telecom, China Mobile, Tietong and other home networks at the same time), if the IP address is the same IP, there will be a conflict. The reason for this is that each NIC must have an exclusive IP. Just like each person has an ID card, there is only one and no other.

A network interface and an IP, for example, if you are a notebook, you use broadband Internet access, this has an IP, and at the same time you also access a router's wireless network, this is another IP, and at the same time you also use a 3G network card to access the Internet, this is another IP....Got it?

Because the IP address is like a coordinate, so as to ensure the accurate receipt and sending of data, the router is like a post office, he brings an address by himself, and the following governs many addresses in a region, so at least 2 IP addresses can work normally.

Theoretically, it came this way, but with the development of technology,

Of course, the IP is unique, but you can set a fixed IP or dynamically assign an IP, but you will only have one IP after you enter the network

A host can have multiple IP addresses.

However, an IP address can only be used on one host.

It's not that you can install a virtual machine on your machine, a virtual machine can have n virtual IPs

It's a wire, an IP address.

1.Your machine can be equipped with many IP addresses, and the gateway can also be equipped with many IP addresses, as long as the address you match the address range of the gateway.

2.You may have VLAN partitioning on the professional switch, so you are connected to the same physical switch, but not on the same virtual switch.

I think the first problem is this, your network is a complex network, you can not only access this intranet, through the intranet gateway to access the public network, but also through the automatically obtained public network address. to access the Internet. You can use tracert to see what path you have taken to run to the public network.

As for the second question, you are in your LAN, after setting it into segments, you can't find its gateway, and you can't do without the LAN, because the gateway in this LAN is going out through this gateway. So there is no way to get online.

1.You can set multiple IP addresses, and you can find the answer if you understand the principles and functions of Layer 2, Layer 3, and Layer 4 switches.

2.Similarly, you understand the principles and functions of Layer 2, Layer 3, and Layer 4 switches.

First of all, the LAN is divided by a router, and it has nothing to do with the switch1, your fixed IP has nothing to do with the IP assigned by the DHCP server, the switch can't recognize the IP, only the router can recognize the IP, and the two gateways can access the Internet because there are at least two routers in a LAN, and the gateway is set on the router.

2. I feel that there should be two LANs, this is a private network address, and it will be changed to a public network address through a protocol when leaving the router, and you and the office are not in the same LAN to explain the problem that you can't use his gateway to access the network.

I'm also a beginner, so I hope I can help you.

There are five categories of IP addresses, Class A reserved for ** institutions, Class B for medium-sized companies, Class C for anyone who needs them, Class D for multicast, Class E for experiments, and the number of addresses that can be accommodated varies by class.

An Internet host has at least one IP address, and this IP address is unique to the entire network. If an Internet host has two or more IP addresses, the host belongs to two or more logical networks.