Mail Transfer Agent (MTA), Mail Delivery Agent (MDA),

Mail Transfer Agent (MTA) . An MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol.[
Mail Delivery Agent (MDA) -mail delivery agent or message delivery agent (MDA) is a computer software component that is responsible for the delivery of e-mail messages to a local recipient's mailbox

TCP/IP Protocols

TCP IP protocols

• DNS- is used to resolve internet name to Ip address
• HTTP - is used to transfer files that make up the web pages of WWW.
• SMTP- to transfer of mail messages and attachments
• Telnet - a terminal emulation protocol user to provide remote access to servers and networking
• devices.
• FTP file transfer protocol - user to interactive file transfer between system.

Encapsulation

• Since there are so much details on encapsulation I decided to do a individual blog on it.

Two functions of encapsulation

• identifies pieces of data as part of the same communication
• ensures that data pieces can be directed to the correct receiving end device

The Primary function of the trailer information added by the data link layer encapsulation is to supports error detection

Key functions of Encapsulation

• identifies pieces of data as part of the same communication
• ensures that data pieces can be directed to the correct receiving end device
• enables the reassembly of complete message

5 steps of Data encapsulation
The Application, Presentation and Session layers create DATA from user input
The Transport layer converts the DATA to SEGMENTS
The Network layer converts the SEGMENTS to PACKETS
The Data Link Layer coverts the PACKETS to FRAMES
The physical lyaer coverts the FRAMES to BITS.

DHCP installation and uninstall commands.

DHCP installation
start /w ocsetup DNS-server-core-role

Remove DHCP role

start /w ocsetup DNS-server-core-role /uninstall

Windows Deployment Services

Benefits of WDS:

• Ideal for installing the same OS on multiple computers
• Installs Windows Server 2008, Windows Vista, and Windows 7, Windows Server 2003 and Windows XP
• Enhances performance
• Provides updated boot format
• Uses image-based installation techniques
• Can utilize multicasting for network efficiency
• Offers a redesigned presentation for choosing which operating system to installCan utilize multicasting for network efficiency
• Offers a redesigned presentation for choosing which operating system to install

Requirements for installing WDS:

• DNS server must be configured in your network
• DHCP server must be configured in your network
• Active Directory Domain Services must be configured in your network
• NTFS file system as the file system for your WDS

Adantages of Server Core & the Full Version of Windows 2008

Advantages of Server Core
Designed to have small footprint in the network which make it less vulnerable to Internet attacks.
Good option for system administrator who like to administrate their server using scripts instead of GUI.
For a dedicated server with a since Server Role
Servers that do not require .NET Framework
Server holds critical files where attacks can be prevented.

Advantages of Full Version
Offer a large group of GUI management tools
Allow you to install other GUI based applications
Requirement for .NET framework.
Do not require dedicated server

Client access licenses (CALs)

A CAL defines how many workstations will access the Server

• 5 or 25 for Standard or Enterprise editions
• Additional CALs can be added as needed

There is Flat cost per processor. This is for Datacenter and Itanium-based editions