Computer Networks

HTTP stands for HyperText Transfer Protocol, the foundation of data communication on the World Wide Web. It defines how messages are formatted and transmitted between web browsers and servers. Option B incorrectly says 'Transmission' instead of 'Transfer,' Option C incorrectly says 'Translate,' and Option D incorrectly says 'Transform.' The 'Transfer' aspect refers to moving hypertext (linked text and multimedia) resources between clients and servers.

VOIP stands for Voice Over Internet Protocol, which is a technology for delivering voice communications over IP networks like the Internet. It enables phone calls over broadband connections. Options A, B, and C are incorrect - 'Instant Party' is nonsensical, 'Information Program' is unrelated, and 'Procedure' is not the correct term (Protocol is).

IP in IP address stands for Internet Protocol, which is the set of rules governing the format of data sent over the Internet or other networks. Every device on a network has a unique IP address. Options A, B, and C are incorrect - 'Provider' refers to ISPs, 'Information' is not the correct term, and 'Path' describes routing but is not part of the protocol name.

GPRS stands for General Packet Radio Service, a mobile data standard. 'Radio Service' is correct - it uses radio channels for packet-switched data. 'Rays' and 'Router' are incorrect terms, and 'Reuters' is a news agency, unrelated to mobile technology.

WAP stands for Wireless Application Protocol, a technical standard for accessing information over mobile wireless networks. 'Protocol' is the standard term in networking. 'Program' and 'Programme' are incorrect, and 'Provider' doesn't fit the technical context.

An IMS call requires DB-PCB (Database Program Communication Block), IO-AREA (Input/Output Area), and SSA (Segment Search Arguments). All three components are necessary for proper IMS database calls, so 'All of the above' is correct.

SOAP (Simple Object Access Protocol) is the XML-based transport protocol for web service messages. While SOAP messages typically travel over HTTP, SOAP itself is the protocol format, not the transport. TCP/IP is the underlying network stack, not the web service protocol.

PNG (Portable Network Graphics) is a lossless image file format specifically designed for web graphics. It supports transparency and has become a standard for web images alongside JPEG and GIF. PNC, PST, and PPT are not related to PNG - PST is an Outlook file, and PPT is PowerPoint.

PNG (Portable Network Graphics) is a lossless image format designed specifically for web graphics. It supports transparency and is ideal for screenshots, logos, and graphics with sharp edges.

The Generic Connection Framework (GCF) in mobile Java (MIDP) requires HttpConnection to support HTTP 1.1 as the mandatory protocol. This ensures standardized web communication for mobile applications.

POP3 and IMAP are the standard protocols for retrieving incoming email from a mail server. POP3 typically downloads and stores messages locally, while IMAP keeps them on the server and syncs across devices. SMTP handles the sending of outgoing messages, not incoming retrieval.

SMTP servers listen on port 25 by default to accept incoming email messages for transmission. Port 110 is used by POP3 for retrieving email, while port 115 is for FTP (File Transfer Protocol) and unrelated to email.

A port is an endpoint in a network connection that allows bidirectional information transfer to and from a specific process or service on a server. Ports (like port 25 for SMTP or port 80 for HTTP) enable multiple network services to run simultaneously on the same machine by directing traffic to the appropriate server process.