Network General Training - 04 Understanding the TCP/IP I

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Network General Training - 04 Understanding the TCP/IP I

Post by admin » Thu Jan 29, 2015 2:13 pm

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
01.png
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
02.png
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Re: Network General Training - 04 Understanding the TCP/IP I

Post by admin » Thu Jan 29, 2015 2:28 pm

IP PDU Header
03.png
IP Address Format: Dotted Decimal Notation
04.png
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Re: Network General Training - 04 Understanding the TCP/IP I

Post by admin » Thu Jan 29, 2015 2:31 pm

IP Address Classes: The First Octet
05.png
IP Address Ranges
06.png
Reserved Address
07.png
Public IP Addresses
09.png
Private IP Addresses
10.png
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Re: Network General Training - 04 Understanding the TCP/IP I

Post by admin » Thu Jan 29, 2015 3:57 pm

DHCP
11.png
DNS
-Application specified in the TCP/IP suite
-A way to translate human-readable names into IP addresses
12.png
Network Connection
13.png
14.png
15.png
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Re: Network General Training - 04 Understanding the TCP/IP I

Post by admin » Thu Jan 29, 2015 3:59 pm

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

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