WSUS / Windows Update services client commands

Force Detection of Updates and Report to the WSUS Server:

open command prompt and type the following commands

wuauclt.exe /detectnow /reportnow

Windows Update Log (Checking Errors/Process Status):

%WINDIR%\WindowsUpdate.log

Cleanup all cached files and force detection:

net stop wuauserv
net start wuauserv
wuauclt.exe /resetauthorization /detectnow

Delete winhttpproxy settings:
proxycfg -d
wuauclt /detectnow /register /reportnow

MCITP EXAM CODES

MCITP (MICROSOFT IT PROFESSIONAL)

70-680        CONFIGURING WINDOWS 7
70-642        NETWORK INFRASTRUCTURE (NI)
70-643        APPLICATION INFRASTRUCTURE (AI)
70-640        ACTIVE-DIRECTORY INFRASTRUCTURE
70-647        ENTERPRISE ADMINISTRATOR

HOW TO Upgrade to MCITP: Enterprise Administrator

MCSE Upgrade to MCITP: Enterprise Administrator
(3 Exams)

70-649 MCTS: Upgrading from Windows Server 2003 MCSE 

to, Windows Server 2008, Technology Specializations

70-680 MCTS: Windows 7, Configuring

70-647 MCITP: Windows Server 2008, Enterprise Administrator

HOW DHCP WORKs

HOW DHCP WORK:

DHCP is used to allocate IP address Dynamically to to the clients on a network.

DHCP Components:

DHCP Client:it is a service available to the Clients OS as well as Server OS.DHCP client service is requesting for IP address and obtaining ip from dhcp server.

DHCP Server :Define a scope (IP address Range) for the clients and lease (time duration) so that every time clients uses ip for a sepecific period and after that ip is changed .

IP ADDRESS TYPES:

static vs Dynamic ip:

Static : Fixed ip address

Dynamic : Not fixed and change frequently

DORA Process:

DHCP uses 4 Types of Packets for ip address allocation

DISCOVER Packet: 

is used to search a DHCP server on the Network, client does'nt have ip address , so they sends Discover Packets for searching a valid dhcp server on the network.if any dhcp server found , client is request ip address , if clients does'nt found any dhcp server on the network client is uses a APIPA adress automatically.

APIPA(Automatic Private IP Adress) Range between 169.254.00-169.254.255.255
if the client uses APIPA , DHCP Discover Packets continuously forward .if any dhcp server found client release the APIPA ip address and obtain ip from DHCP server.

HOW DNS WORKs

Before going to the DNS server concepts , first we are going to Know about the name Systems:

Computer Names :

NETBIOS NAME:

NETWORK BASIC INPUT OUTPUT SYSTEM
NETBIOS NAME IS ALWAYS IN CAPS LETTER

MAX LENGTH : 15 CHARACTERS

TOTAL MAX LENGTH: 16 CHAR

16TH CHA IS HIDDEN AND USED AS A SERVICE CALL.

HOW TO CHECK YOUR NETBIOS NAME?

How to enable/disable netbios over tcp/ip ?

by default your computer name is Netbios name also called full computer name

What is DNS name :  ?
DNS name is a full computer  name used by new os default.

example :   mypc.mydomain.com
this name is called dns name. that is uniquely identified a computer on domain.

DNS name is also called internet names that is used on internet or domain