Description (2017-5-10 11:02:31):
Of 0. The role of IP addresses, TCP / IP, the network layer packet, the source IP (which device issued), the purpose of IP (the device to which data is to be sent), each device requires a unique IP address. 32 0-32 1, a total of 2 ^ 32. Dotted decimal wording.
1. IP two parts, network and host bits, divided into 4 sections, one section 8, a total of 32
2. IP address classification, ABCDE
3. IP address
0 at the beginning (MSB) is class A, the range of 1 to 126 (0 and 127 are reserved) ratio is 1/2;
10 the beginning of the Classes B, the range of 128 to 191, accounting for 1/4;
110 is the beginning of the class C, the range of 192 to 223, accounting for 1/8;
1110 is the beginning of the D, the range of 224 to 239, accounting for 1/16;
4. private address, this range is three internal business use.
5. In a network, the smallest of the IP network segment address of the called network address , the maximum of the IP network segment address is called a broadcast address
6. Binary Decimal: bits × 2 ^ 0 + ten × 2 ^ 1 + ....
Decimal Binary turn: addition modulo two, arranged from bottom to top the remainder
Description (2017-5-10 11:02:31):
Of 0. The role of IP addresses, TCP / IP, the network layer packet, the source IP (which device issued), the purpose of IP (the device to which data is to be sent), each device requires a unique IP address. 32 0-32 1, a total of 2 ^ 32. Dotted decimal wording.
1. IP two parts, network and host bits, divided into 4 sections, one section 8, a total of 32
2. IP address classification, ABCDE
3. IP address
0 at the beginning (MSB) is class A, the range of 1 to 126 (0 and 127 are reserved) ratio is 1/2;
10 the beginning of the Classes B, the range of 128 to 191, accounting for 1/4;
110 is the beginning of the class C, the range of 192 to 223, accounting for 1/8;
1110 is the beginning of the D, the range of 224 to 239, accounting for 1/16;
4. private address, this range is three internal business use.
5. In a network, the smallest of the IP network segment address of the called network address , the maximum of the IP network segment address is called a broadcast address
6. Binary Decimal: bits × 2 ^ 0 + ten × 2 ^ 1 + ....
Decimal Binary turn: addition modulo two, arranged from bottom to top the remainder