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NE20E-S2 V800R010C10SPC500 Configuration Guide - IP Services 01

This is NE20E-S2 V800R010C10SPC500 Configuration Guide - IP Services
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Overview of IPv4

Overview of IPv4

Internet Protocol version 4 (IPv4) is the core protocol of the TCP/IP protocol suite. All TCP, UDP, ICMP and IGMP data is carried in IP packets. Devices on different networks use IP addresses for communication. In addition, to ensure the security of the TCP/IP protocol suite, you can defend against network attacks by controlling ICMP packets and IP packets carrying options.

On an IP network, each host must have an IP address for communication. An IP address is of 32 bits and consists of two parts: network ID and host ID.
  • The network ID uniquely identifies a network segment or the summarized network segment of multiple network segments. The IP address and subnet mask are converted to be binary numbers. The network ID is obtained after the bit-by-bit AND operation is performed.

  • The host ID uniquely identifies a specific device on a network segment. The IP address and subnet mask are converted to be binary numbers. Taking the reverse of the subnet mask, the host ID is obtained after the bit-by-bit AND operation is performed.

If multiple devices on the same network segment have the same network ID, they belong to the same network, regardless of their physical locations.

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Updated: 2019-01-02

Document ID: EDOC1100055376

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