Sunday, February 24, 2013
Job Description of Windows L3 Administrator
Windows System Admin (Level 3)
Skills: Windows Admin 2008, VmWare, AD, Exchange and Citrix
Primarily responsible to handle Windows Servers, Microsoft AD and exchange infrastructure. Candidate should be experienced and capable to administer, control, and generally provide support to AD and Exchange.
Experience in Planning and Execution of Migration of Active Directory & Microsoft Exchange. Experience on Design, Deployment & Administration of overall Microsoft technologies.
Technical Skills:
• Minimum 5 years’ experience on Design, Deployment & Administration of Active Directory 2003 / 2008 & Exchange 2003 / 2010
• Hands on experience on Disaster recovery of Active Directory 2003 / 2008 & Microsoft Exchange 2003 / 2010
• Experience on Monitoring of Active Directory 2003 / 2008 and Microsoft Exchange 2003 / 2010
• Experience on Planning and Execution of Migration of Active Directory & Microsoft Exchange.
• Experience on Design, Deployment & Administration of AD-RMS.
• Experience on Design, Deployment & Administration of SCSM, SCCM & SCOM.
• Experience on Design, Deployment & Administration of OCS and Lync.
• Experience on Design, Deployment & Administration of ISA and TMG/Forefront
• Experience on Design, Deployment & Administration of IAS / IIS / DNS / DHCP/Terminal servers.
• Experience on SharePoint administration.
• Experience on Design, Deployment & Administration of virtualization (Hyper-V)
• Experience on Design, Deployment & Administration on PKI.
• Experience on SQL server administration and Symantec Enterprise vault administration is preferred.
• Experience on Windows Server 2003 32 bit and 64 bit and above preference towards Windows Server 2008 - strongly preferred
• Experience on Vmware Vsphere
• Experience on Citrix Presentation Server 4 and above, preference towards Presentation Server 4.5 and/or XENAPP 5.0
• Experience on XenDesktop 4 or 5
• Eexperience on application installation and how it interacts with the Citrix Application (registry, file system, etc).
• Knowledge and working experience on PowerShell / Scripts.
• Knowledge and working experience on Blackberry BES.
• Knowledge and Experience on Citrix is preferred.
• Basic Core Networking (Routing & Switching) knowledge and experience is preferred.
Responsibilities:
• Overall duties will include identifying and resolving issues within the scope of Microsoft domain, planning and executing and participation in Disaster Recovery exercises.
• Perform upgrades, patching and other core administrative functions.
• Perform capacity planning related to exchange database growth and system utilization, trend analysis and predicting future requirements.
• Maintain documentation of configuration, administration and maintenance procedures according to program requirements.
• Assisting in and monitor policies, procedures and standards relating to AD / Exchange and other Microsoft applications’ administration
• Initiate the Inquiry/purchase requirements with department & project approvals.
• Interact with procurement in processing the purchase and invoice proceedings.
• Analyze problem areas, interpret operational needs and develop a creative solution.
• Work in cross functional team to perform analysis, design, testing and implementation. Ensure technical information and ideas are understandable to target audiences .Keep the system current with changing technologies.
• Work closely with other departmental entities and provide comprehensive support Provide technical support to
• all end users and keep them updated about the options.
• Perform other related duties incidental to the work described in support of the department.
• Develop reports reflecting all the necessary fields and maintain the usage, capacity management, health check and monitor reports.
• Perform other related duties incidental to the work described in support of the department.
• Should be having the capacity to design/plan lead the projects.
• Ability to utilize SCOM & other Microsoft System Center products to monitor & configure both physical and virtual systems.
Sunday, February 3, 2013
DNS Interview Questions
DNS Interview Questions
DNS Interview Questions And Answers
1.What is DNS?
Domain Naming Services or System: - used for resolving host names to IPs and IPs to Host Names.
2.What is NBNS?
NetBIOS Naming System, ex. - WINS, 2k access resources using DNS naming Conventions
3.What is a Forward Lookup?
Resolving Host Names to IP Addresses
4.What is Reverse Lookup?
It's a file contains host names to IP mapping information.
5.What is a Resource Record?
It is a record provides the information about the resources available in the N/W infrastructure.
6.What are the diff. DNS Roles?
Standard Primary, Standard Secondary, & AD Integrated.
7.What is a Zone?
Zone is a sub tree of DNS database.
8.What is primary, Secondary, stub & AD Integrated Zone?
Primary Zone: - zone which is saved as normal text file with filename (.dns) in DBS folder. Maintains a read, write copy of zone database
Secondary Zone: - maintains a read only copy of zone database on another DNS server. Provides fault tolerance and load balancing by acting as backup server to primary server.
Stub zone: - contains a copy of name server and SOA records used for reducing the DNS search orders. Provides fault tolerance and load balancing.
9.What does a zone consist of & why do we require a zone?
Zone consists of resource records and we require zone for representing sites.
10.What is Caching Only Server?
When we install 2000 & 2003 server it is configured as caching only server where it maintains the frequently accessed sites information and again when we access the same site for next time it is obtain from cached information instead of going to the actual site.
11.What is forwarder?
When one DNS server can't receive the query it can be forwarded to another DNS once configured as forwarder.
12.What is secondary DNS Server?
It is backup for primary DNS where it maintains a read only copy of DNS database.
13.How to enable Dynamic updates in DNS?
Start>Program>Admin tools> DNS >Zone properties.
14.What are the properties of DNS server?
INTERFACES, FORWARDERS, ADVANCED, ROUTINGS, SECURITY, MONITORING, LOGGING, DEBUG LOGGING.
15.Properties of a Zone?
General, SOA, NAMESERVER, WINS, Security, and ZONE Transfer.
16.What is scavenging?
Finding and deleting unwanted records.
17.What are SRV records?
SRV are the service records, there are 6 service records. They are useful for locating the services.
18.What are the types of SRV records?
MSDCS:Contains DCs information
TCP:Contains Global Catalog, Kerberos & LDAP information.
UDP:Contains Sites information
Sites:Contains Sites information
Domain DNS Zone:Conations domain's DNS specific information
Forest DNS zone:Contains Forest's Specific Information.
19.Where does a Host File Reside?
c:\windows\system32\drivers\etc.
20.What is SOA?
Start of Authority: useful when a zone starts. Provides the zone startup information
21.What is a query?
A request made by the DNS client to provide the name server information.
22.What are the diff. types of Queries?
Recursion, iteration
23.Tools for troubleshooting DNS?
DNS Console, NSLOOKUP, DNSCMD, IPCONFIG, Logs, PM.
Domain Naming Services or System: - used for resolving host names to IPs and IPs to Host Names.
2.What is NBNS?
NetBIOS Naming System, ex. - WINS, 2k access resources using DNS naming Conventions
3.What is a Forward Lookup?
Resolving Host Names to IP Addresses
4.What is Reverse Lookup?
It's a file contains host names to IP mapping information.
5.What is a Resource Record?
It is a record provides the information about the resources available in the N/W infrastructure.
6.What are the diff. DNS Roles?
Standard Primary, Standard Secondary, & AD Integrated.
7.What is a Zone?
Zone is a sub tree of DNS database.
8.What is primary, Secondary, stub & AD Integrated Zone?
Primary Zone: - zone which is saved as normal text file with filename (.dns) in DBS folder. Maintains a read, write copy of zone database
Secondary Zone: - maintains a read only copy of zone database on another DNS server. Provides fault tolerance and load balancing by acting as backup server to primary server.
Stub zone: - contains a copy of name server and SOA records used for reducing the DNS search orders. Provides fault tolerance and load balancing.
9.What does a zone consist of & why do we require a zone?
Zone consists of resource records and we require zone for representing sites.
10.What is Caching Only Server?
When we install 2000 & 2003 server it is configured as caching only server where it maintains the frequently accessed sites information and again when we access the same site for next time it is obtain from cached information instead of going to the actual site.
11.What is forwarder?
When one DNS server can't receive the query it can be forwarded to another DNS once configured as forwarder.
12.What is secondary DNS Server?
It is backup for primary DNS where it maintains a read only copy of DNS database.
13.How to enable Dynamic updates in DNS?
Start>Program>Admin tools> DNS >Zone properties.
14.What are the properties of DNS server?
INTERFACES, FORWARDERS, ADVANCED, ROUTINGS, SECURITY, MONITORING, LOGGING, DEBUG LOGGING.
15.Properties of a Zone?
General, SOA, NAMESERVER, WINS, Security, and ZONE Transfer.
16.What is scavenging?
Finding and deleting unwanted records.
17.What are SRV records?
SRV are the service records, there are 6 service records. They are useful for locating the services.
18.What are the types of SRV records?
MSDCS:Contains DCs information
TCP:Contains Global Catalog, Kerberos & LDAP information.
UDP:Contains Sites information
Sites:Contains Sites information
Domain DNS Zone:Conations domain's DNS specific information
Forest DNS zone:Contains Forest's Specific Information.
19.Where does a Host File Reside?
c:\windows\system32\drivers\etc.
20.What is SOA?
Start of Authority: useful when a zone starts. Provides the zone startup information
21.What is a query?
A request made by the DNS client to provide the name server information.
22.What are the diff. types of Queries?
Recursion, iteration
23.Tools for troubleshooting DNS?
DNS Console, NSLOOKUP, DNSCMD, IPCONFIG, Logs, PM.
Tuesday, January 8, 2013
Troubleshoot 10 common Exchange problems
1.Users cannot access server. – If you users can not access your Exchange system, but your system and Exchange services are running, there are several possible explanations. The first thing to check is that your network is responding properly. If users do have lost network connectivity, you will need to check their overall connectivity status, connectivity to other servers on the same switch as the Exchange server, also check the network controller in your Exchange system and verify that the system has connectivity to elsewhere on your network. Another possible reason for users not being able to connect to your Exchange system is if your Active Directory has stopped authenticating users. If your users cannot authenticate, then they will not be able to log into your Exchange system.
2.User’s messages are disappearing from their mailbox. – If messages are disappearing from users mailbox, one common cause of this is the auto archive feature in Outlook. This happens when the PST file being archived to becomes corrupt. To correct this you must find the PST, and run the ScanPST.exe tool (included with Outlook) to repair the PST file.
3.A user’s account was mistakenly deleted from Active Directory, and now they cannot access their mail. – If a users account has been deleted from Active Directory, their association to their mailbox is deleted. Normally, you can just right click the mailbox in Exchange System Manager and reconnect the mailbox to a new account. If this option is not available, you may need to run the Mailbox Cleanup on the Information Store containing the mailbox.
4.Outgoing mail is not being delivered, and is stuck in your queue. – If your outgoing mail is not being delivered, and is stuck in your queue, the first corrective action you should take is to restart your SMTP service. If this does not work, you should check your DNS resolution. Perform an nslookup (with type=mx) on your mail server, and see if you can resolve several domains you commonly exchange mail with. If you cannot pull MX records for those domains, then you should perform and IPCONFIG /FLUSHDNS to flush your DNS cache. If this does not work, then you will need to begin troubleshooting your DNS infrastructure.
5.Mail is not being delivered to a Distribution List – If you have one (or more) distribution lists that are not receiving mail that is being sent to them, you need to check that the group type in Active Directory has not been changed from the group type Distribution to the group type Security.
6.Mail to a certain user is not being delivered, and a trace shows it as stopping at the step “Submitted to Categorizer” – If you have a message that is not being delivered, and a trace shows that it never goes past the step “Submitted to Categorizer” it shows that Exchange is unable to determine what should be done with the mail. One common cause of this, is that the message is being sent to a users contact. If this is the case, delete the contact and recreate it. This will often correct the problem, as the contact has become corrupt.
7.Some users passwords are rejected when attempting to access your system through IMAP – If a users password contains a special ASCII character (such as ½), they will not be able to access IMAP. Passwords must contain only standard characters and symbols to access IMAP.
8.SMTP Service keeps crashing. – If you SMTP service keeps crashing, the first thing you should do is to empty your mail queues, then restart the service. Many times a corrupt piece of mail will cause the service to crash when it attempts to process it. Reference Link : http://www.techrepublic.com/i/tr/downloads/home/troubleshoot_10_common_exchange_problems.pdf
2.User’s messages are disappearing from their mailbox. – If messages are disappearing from users mailbox, one common cause of this is the auto archive feature in Outlook. This happens when the PST file being archived to becomes corrupt. To correct this you must find the PST, and run the ScanPST.exe tool (included with Outlook) to repair the PST file.
3.A user’s account was mistakenly deleted from Active Directory, and now they cannot access their mail. – If a users account has been deleted from Active Directory, their association to their mailbox is deleted. Normally, you can just right click the mailbox in Exchange System Manager and reconnect the mailbox to a new account. If this option is not available, you may need to run the Mailbox Cleanup on the Information Store containing the mailbox.
4.Outgoing mail is not being delivered, and is stuck in your queue. – If your outgoing mail is not being delivered, and is stuck in your queue, the first corrective action you should take is to restart your SMTP service. If this does not work, you should check your DNS resolution. Perform an nslookup (with type=mx) on your mail server, and see if you can resolve several domains you commonly exchange mail with. If you cannot pull MX records for those domains, then you should perform and IPCONFIG /FLUSHDNS to flush your DNS cache. If this does not work, then you will need to begin troubleshooting your DNS infrastructure.
5.Mail is not being delivered to a Distribution List – If you have one (or more) distribution lists that are not receiving mail that is being sent to them, you need to check that the group type in Active Directory has not been changed from the group type Distribution to the group type Security.
6.Mail to a certain user is not being delivered, and a trace shows it as stopping at the step “Submitted to Categorizer” – If you have a message that is not being delivered, and a trace shows that it never goes past the step “Submitted to Categorizer” it shows that Exchange is unable to determine what should be done with the mail. One common cause of this, is that the message is being sent to a users contact. If this is the case, delete the contact and recreate it. This will often correct the problem, as the contact has become corrupt.
7.Some users passwords are rejected when attempting to access your system through IMAP – If a users password contains a special ASCII character (such as ½), they will not be able to access IMAP. Passwords must contain only standard characters and symbols to access IMAP.
8.SMTP Service keeps crashing. – If you SMTP service keeps crashing, the first thing you should do is to empty your mail queues, then restart the service. Many times a corrupt piece of mail will cause the service to crash when it attempts to process it. Reference Link : http://www.techrepublic.com/i/tr/downloads/home/troubleshoot_10_common_exchange_problems.pdf
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