Understanding the TCP/IP Internet Layer
Internet Protocol Characteristics
Operates at network layer of OSI
Connectionless protocol
Packets treated independently
Hierarchical addressing
Best-effort delivery
No data-recovery features
Why IP Addresses?
They uniquely identify each device on an IP network.
Every host (computer, networking device, peripheral) must have a unique address.
Host ID:
-Identifies the individual host
-Is assigned by organizations to individual devices
Network General Training - 04 Understanding the TCP/IP I
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1. 本版是定位于惠普网络产品的技术讨论区。
2. 本版鼓励发帖共同讨论技术问题，不鼓励站内信件私下交流，独知知不如众知知。
3. 本版允许转贴或引用他人的作品，但必须声明原作者信息。
4. 本版禁止发表出售、求购、或其他非技术讨论等帖子。
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Network General Training - 04 Understanding the TCP/IP I
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Re: Network General Training - 04 Understanding the TCP/IP I
IP PDU Header
IP Address Format: Dotted Decimal Notation
IP Address Format: Dotted Decimal Notation
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Re: Network General Training - 04 Understanding the TCP/IP I
IP Address Classes: The First Octet
IP Address Ranges
Reserved Address
Public IP Addresses
Private IP Addresses
IP Address Ranges
Reserved Address
Public IP Addresses
Private IP Addresses
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Re: Network General Training - 04 Understanding the TCP/IP I
DHCP
DNS
-Application specified in the TCP/IP suite
-A way to translate human-readable names into IP addresses
Network Connection
DNS
-Application specified in the TCP/IP suite
-A way to translate human-readable names into IP addresses
Network Connection
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Re: Network General Training - 04 Understanding the TCP/IP I
IP network addresses consist of two parts: the network ID and the host ID.
IPv4 addresses have 32 bits that are divided into octets and are generally shown in dotted decimal form (for example, 192.168.54.18).
When written in a binary format, the first bit of a Class A address is always 0, the first 2 bits of a Class B address are always 10, and the first 3 bits of a Class C address are always 110.
Certain IP addresses (network and broadcast) are reserved and cannot be assigned to individual network devices.
Internet hosts require a unique, public IP address, but private hosts can have any valid private address that is unique within the private network.
DHCP is used to assign IP addresses automatically, and also to set TCP/IP stack configuration parameters such as the subnet mask, default router, and DNS servers.
DNS is an application that is specified in the TCP/IP suite, providing a means to translate human-readable names into IP addresses.
Host provides tools that can be used to verify the IP address of the host:
-Network connections
-IPCONFIG
IPv4 addresses have 32 bits that are divided into octets and are generally shown in dotted decimal form (for example, 192.168.54.18).
When written in a binary format, the first bit of a Class A address is always 0, the first 2 bits of a Class B address are always 10, and the first 3 bits of a Class C address are always 110.
Certain IP addresses (network and broadcast) are reserved and cannot be assigned to individual network devices.
Internet hosts require a unique, public IP address, but private hosts can have any valid private address that is unique within the private network.
DHCP is used to assign IP addresses automatically, and also to set TCP/IP stack configuration parameters such as the subnet mask, default router, and DNS servers.
DNS is an application that is specified in the TCP/IP suite, providing a means to translate human-readable names into IP addresses.
Host provides tools that can be used to verify the IP address of the host:
-Network connections
-IPCONFIG