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Interview questions and answers of computer network.

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  • 1. 1 Q: - Whats the difference between local, global and universal groups? Domain local groups assign access permissions to global domain groups for local domain resources. Global groups provide access to resources in other trusted domains. Universal groups grant access to resources in all trusted domains. Q: -I am trying to create a new universal user group. Why cant I? Universal groups are allowed only in native-mode Windows Server 2003 environments. Native mode requires that all domain controllers be promoted to Windows Server 2003 Active Directory. Q: -What is LSDOU? Its group policy inheritance model, where the policies are applied to Local machines, Sites, Domains and Organizational Units. Q: - Why doesnt LSDOU work under Windows NT? If the NTConfig.pol file exists, it has the highest priority among the numerous policies. Q: -Where are group policies stored? %SystemRoot%System32GroupPolicy Q: -What is GPT and GPC? Group policy template and group policy container. Q: - Where is GPT stored? %SystemRoot%SYSVOLsysvoldomainnamePoliciesGUID Q: - You change the group policies, and now the computer and user settings are in conflict. Which one has the highest priority? The computer settings take priority. Q: -You want to set up remote installation procedure, but do not want the user to gain access over it. What do you do? gponame> User Configuration> Windows Settings> Remote Installation Services> Choice Options is your friend. Q: - 10. Whats contained in administrative template conf.adm? Microsoft NetMeeting policies Q: -How can you restrict running certain applications on a machine? Via group policy, security settings for the group, then Software Restriction Policies. Q: -You need to automatically install an app, but MSI file is not available. What do you do? A .zap text file can be used to add applications using the Software Installer, rather than the Windows Installer.
  • 2. 2 Q: - Whats the difference between Software Installer and Windows Installer? The former has fewer privileges and will probably require user intervention. Plus, it uses .zap files. Q: -What can be restricted on Windows Server 2003 that wasnt there in previous products? Group Policy in Windows Server 2003 determines a users right to modify network and dial-up TCP/IP properties. Users may be selectively restricted from modifying their IP address and other network configuration parameters. Q: -How frequently is the client policy refreshed? 90 minutes give or take. Q: - Where is secedit? Its now gpupdate. Q: -You want to create a new group policy but do not wish to inherit. Make sure you check Block inheritance among the options when creating the policy. Q: -What is "tattooing" the Registry? The user can view and modify user preferences that are not stored in maintained portions of the Registry. If the group policy is removed or changed, the user preference will persist in the Registry. Q: - How do you fight tattooing in NT/2000 installations? You cant. Q: -How do you fight tattooing in 2003 installations? User Configuration - Administrative Templates - System - Group Policy - enable - Enforce Show Policies Only. Q: -What does IntelliMirror do? It helps to reconcile desktop settings, applications, and stored files for users, particularly those who move between workstations or those who must periodically work offline. Q: - Whats the major difference between FAT and NTFS on a local machine? FAT and FAT32 provide no security over locally logged-on users. Only native NTFS provides extensive permission control on both remote and local files. Q: - How do FAT and NTFS differ in approach to user shares? They dont, both have support for sharing. Q: -Explan the List Folder Contents permission on the folder in NTFS. Same as Read & Execute, but not inherited by files within a folder. However, newly created subfolders will inherit this permission.
  • 3. 3 Q: - I have a file to which the user has access, but he has no folder permission to read it. Can he access it? It is possible for a user to navigate to a file for which he does not have folder permission. This involves simply knowing the path of the file object. Even if the user cant drill down the file/folder tree using My Computer, he can still gain access to the file using the Universal Naming Convention (UNC). The best way to start would be to type the full path of a file into Run window. Q: - For a user in several groups, are Allow permissions restrictive or permissive? Permissive, if at least one group has Allow permission for the file/folder, user will have the same permission. Q: -For a user in several groups, are Deny permissions restrictive or permissive? Restrictive, if at least one group has Deny permission for the file/folder, user will be denied access, regardless of other group permissions. Q: - What hidden shares exist on Windows Server 2003 installation? Admin$, Drive$, IPC$, NETLOGON, print$ and SYSVOL. Q: - Whats the difference between standalone and fault-tolerant DFS (Distributed File System) installations? The standalone server stores the Dfs directory tree structure or topology locally. Thus, if a shared folder is inaccessible or if the Dfs root server is down, users are left with no link to the shared resources. A fault-tolerant root node stores the Dfs topology in the Active Directory, which is replicated to other domain controllers. Thus, redundant root nodes may include multiple connections to the same data residing in different shared folders. Q: -Were using the DFS fault-tolerant installation, but cannot access it from a Win98 box. Use the UNC path, not client, only 2000 and 2003 clients can access Server 2003 fault-tolerant shares. Q: - Where exactly do fault-tolerant DFS shares store information in Active Directory? In Partition Knowledge Table, which is then replicated to other domain controllers. Q: -Can you use Start->Search with DFS shares? Yes. Q: -What problems can you have with DFS installed? Two users opening the redundant copies of the file at the same time, with no file-locking involved in DFS, changing the contents and then saving. Only one file will be propagated through DFS. Q: - I run Microsoft Cluster Server and cannot install fault-tolerant DFS. Yeah, you cant. Install a standalone one. Q: -Is Kerberos encryption symmetric or asymmetric? Symmetric.
  • 4. 4 Q: -How does Windows 2003 Server try to prevent a middle-man attack on encrypted line? Time stamp is attached to the initial client request, encrypted with the shared key. Q: - What hashing algorithms are used in Windows 2003 Server? RSA Data Securitys Message Digest 5 (MD5), produces a 128-bit hash, and the Secure Hash Algorithm 1 (SHA-1), produces a 160-bit hash. Q: - What third-party certificate exchange protocols are used by Windows 2003 Server? Windows Server 2003 uses the industry standard PKCS-10 certificate request and PKCS-7 certificate response to exchange CA certificates with third-party certificate authorities. Q: -Whats the number of permitted unsuccessful logons on Administrator account? Unlimited. Remember, though, that its the Administrator account, not any account thats part of the Administrators group. Q: - If hashing is one-way function and Windows Server uses hashing for storing passwords, how is it possible to attack the password lists, specifically the ones using NTLMv1? A cracker would launch a dictionary attack by hashing every imaginable term used for password and then compare the hashes. Q: -Whats the difference between guest accounts in Server 2003 and other editions? More restrictive in Windows Server 2003. Q: -How many passwords by default are remembered when you check "Enforce Password History Remembered"? Users last 6 passwords. Q: - What is DHCP? DHCP stands for "Dynamic Host Configuration Protocol". Q: - What is DHCP's purpose? DHCP's purpose is to enable individual computers on an IP network to extract their configurations from a server (the 'DHCP server') or servers, in particular, servers that have no exact information about the individual computers until they request the information. The overall purpose of this is to reduce the work necessary to administer a large IP network. The most significant piece of information distributed in this manner is the IP address. Q: - Can DHCP work with Apple Talk or IPX? No, it is too tied to IP. Furthermore, they don't need it since they have always had automated mechanisms for assigning their own network addresses.
  • 5. 5 Q: - What is a DHCP lease? A DHCP lease is the amount of time that the DHCP server grants to the DHCP client permission to use a particular IP address. A typical server allows its administrator to set the lease time. Q: - What is a Client ID? What is termed the Client ID for the purposes of the DHCP protocol is whatever is used by the protocol to identify the client computer. By default, DHCP implementations typically employ the client's MAC address for this purpose, but the DHCP protocol allows other options. Some DHCP implementations have a setup option to specify the client ID you want. One alternative to the MAC address is simply a character string of your choice. In any case, in order for DHCP to function, you must be certain that no other client is using the client ID you choose, and you must be sure the DHCP server will accept it. Q: - Can DHCP support statically defined addresses?? Yes. At least there is nothing in the protocol to preclude this and one expects it to be a feature of any DHCP server. This is really a server matter and the client should work either way. The RFC refers to this as manual