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For different network applications, the subnet mask may look like 255.255.255.240.
This means it is a small network accommodating a maximum of 15 nodes in the
network.
Default gateway:
For the routed packet, if the destination is not in the routing table, all the traffic is put
into the device with the designated IP address, known as default router. Basically, it
is a routing policy. The gateway setting is used for Trap Events Host only in the
switch.
For assigning an IP address to the switch, you just have to check what the IP
address of the network will be connected with the switch. Use the same network
address and append your host address to it.
Fig. 2-12
First, IP Address: as shown in the Fig. 2-12, enter “192.168.1.1”, for instance. For
sure, an IP address such as 192.168.1.x must be set on your PC.
Second, Subnet Mask: as shown in the Fig. 2-12, enter “255.255.255.0”. Any
subnet mask such as 255.255.255.x is allowable in this case.
DNS:
The Domain Name Server translates human readable machine name to IP address.
Every machine on the Internet has a unique IP address. A server generally has a
static IP address. To connect to a server, the client needs to know the IP of the
server. However, user generally uses the name to connect to the server. Thus, the
switch DNS client program (such as a browser) will ask the DNS to resolve the IP
address of the named server.