GigaX Series L2 Managed Switch User Guide
6
IP Addresses, Network Masks, and
Subnets
6.1 IP
Addresses
This section pertains only to IP addresses for IPv4 (version 4 of
the Internet Protocol). IPv6 addresses are not covered.
This section assumes basic knowledge of binary numbers, bits,
and bytes. For details on this subject, see Appendix 6.
IP addresses, the Internet's version of telephone numbers, are used to identify
individual nodes (computers or devices) on the Internet. Every IP address
contains four numbers, each from 0 to 255 and separated by dots (periods),
e.g. 20.56.0.211. These numbers are called, from left to right, field1, field2,
field3, and field4.
This style of writing IP addresses as decimal numbers separated by dots is
called
dotted decimal notation
. The IP address 20.56.0.211 is read "twenty dot
fifty-six dot zero dot two-eleven."
6.1.1
Structure of an IP address
IP addresses have a hierarchical design similar to that of telephone numbers.
For example, a 7-digit telephone number starts with a 3-digit prefix that
identifies a group of thousands of telephone lines, and ends with four digits that
identify one specific line in that group.
Similarly, IP addresses contain two kinds of information.
Network ID
Identifies a particular network within the Internet or intranet
Host ID
Identifies a particular computer or device on the network
The first part of every IP address contains the network ID, and the rest of the
address contains the host ID. The length of the network ID depends on the
network's
class
(see following section). Table 7 shows the structure of an IP
address.
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Summary of Contents for GigaX 2024X
Page 1: ...GigaX Series Layer 2 Managed Switch User Guide ...
Page 24: ...GigaX Series L2 Managed Switch User s Guide Figure 7 IP Setup 24 ...
Page 31: ...GigaX Series L2 Managed Switch User Guide Figure 12 Management 31 ...
Page 33: ...GigaX Series L2 Managed Switch User Guide Figure 13 IP Setup 33 ...
Page 38: ...GigaX Series L2 Managed Switch User s Guide Figure 17 Physical Interface 38 ...
Page 47: ...GigaX Series L2 Managed Switch User Guide Figure 24 Dynamic Address 47 ...
Page 51: ...GigaX Series L2 Managed Switch User Guide Figure 26 Tagged VLAN 51 ...
Page 54: ...GigaX Series L2 Managed Switch User s Guide Figure 28 Cos Queue Mapping 54 ...
Page 62: ...GigaX Series L2 Managed Switch User s Guide Figure 34 USM User 62 ...
Page 70: ...GigaX Series L2 Managed Switch User s Guide Figure 40 Historical Status 70 ...
