Computer Networks

On a Windows NT 4.0 machine, the standard resolution order starts with the local host name, then checks the local Hosts file, queries DNS, checks the NetBIOS cache, queries WINS, attempts a broadcast, and finally checks the LMHOSTS file.

TCP/IP is the standard cross-platform network protocol that both Windows (SQL Server) and Unix systems support natively. Named Pipes is Windows-specific and won't work with Unix. There is no 'Unix Command Protocol' - this is a distractor. Multiprotocol is a Windows-specific RPC-based protocol that also doesn't support Unix clients.

FTP (File Transfer Protocol) traditionally uses port 21 for control connections. SSL (Secure Sockets Layer), which evolved into TLS, is used for secure HTTP (HTTPS) on port 443. Option B incorrectly lists 444 for SSL. Option C swaps FTP's port 21 with Telnet's port 23. Option D reverses both port assignments.

With a slow 128K link, you should configure Group Policy at the parent OU level (home.cert21.com) rather than each individual OU - this minimizes replication traffic across the slow WAN link. Options A, C, and D suggest configuring policies for each OU, which would create excessive policy replication over the limited bandwidth connection.

Windows 2000 Active Directory requires a DNS server that supports SRV records to locate domain controllers and services. SRV records allow clients to find specific services like LDAP, Kerberos, and GC within the domain. Dynamic DNS updates enable domain controllers to automatically register their records. DHCP with dynamic DNS (Option A) addresses IP assignment but doesn't solve the core AD DNS requirement. WINS (Option D) is a legacy NetBIOS name service, not required for Windows 2000 AD.

When upgrading from Windows NT 4.0 to Windows 2000, the correct sequence is to first promote a BDC to PDC (to ensure a stable PDC exists during migration), then upgrade that newly promoted PDC. This preserves the PDC role during the upgrade process and ensures a smooth transition to Windows 2000 Active Directory. Option A incorrectly upgrades DNS first. Option C attempts to upgrade the existing PDC directly without ensuring a stable backup PDC. Option D upgrades another BDC first without promoting Server1 to PDC.

To assign IP addresses to dial-in clients via DHCP, the RRAS server must be able to communicate with a DHCP server that has an active scope for the appropriate subnet. This ensures the RRAS server can request and lease a block of addresses for its remote access clients.

The Informatica Repository Server is uniquely identified by the host name (where the server runs) and the port number (which the server listens on). The repository server name is an alias configured within the domain but is not sufficient for network identification - multiple servers could have the same name in different domains. The combination of host name and port number provides the complete network address needed for clients to connect to the correct repository server instance.

SAP (Service Advertising Protocol) is used to advertise services on a network, not to calculate routing paths. RIP, OSPF, and EIGRP are all valid routing algorithms used to determine the shortest or best path.

The Presentation layer (Layer 6) of the OSI model is responsible for the translation, encryption, and compression of data, ensuring that the application layer can understand the information.

Remote Access Service (RAS) supports multiple network protocols to ensure compatibility with various network environments, including TCP/IP, NetBEUI, and IPX/SPX.

HTTPS stands for Hypertext Transfer Protocol Secure (or HTTP Secure), not Hypertext Transport Protocol System. The 'S' specifically indicates the secure layer (SSL/TLS) that encrypts communication. 'Transport Protocol System' is incorrect.

LDAP actually stands for Lightweight Directory Access Protocol, not Lightweight Data Access Protocol. It's a protocol for accessing and maintaining distributed directory information services over a network, commonly used for authentication and user management in enterprise environments. The key word is 'Directory', not 'Data'.

HTTP (Hypertext Transfer Protocol), WAP (Wireless Application Protocol), and FTP (File Transfer Protocol) are all communication protocols used for transferring data over networks - specifically web content, mobile content, and files respectively. SAP, however, is enterprise resource planning (ERP) software for business management - not a network protocol. This functional distinction makes SAP the odd one out.