UGC NET Questions (Paper – 1)

Statements A, B and C correctly express how addressing and DNS work on the Internet, while statement D is incorrect. IP addresses identify devices, DNS maps domain names to these addresses, and IPv4 notation uses dotted decimal format. Encryption of e-mail depends on separate security protocols and configurations, not on DNS itself. Therefore, the set of correct statements consists of A, B and C only.

Option A:
Option A is incomplete because it includes only A and B and omits C. While A and B capture addressing and name resolution, C adds the important detail of common IPv4 notation. Excluding C means the combination does not include all correct statements.

Option B:
Option B is incorrect because it accepts D along with A and B. Although A and B are true, D overstates the role of DNS by attributing end-to-end encryption to it, which is not its function. Including a false statement invalidates this option.

Option C:
Option C is incorrect because it takes B and C as correct but leaves out A. A explains the basic purpose of an IP address and is fundamental to understanding the topic, so its omission makes the answer incomplete.

Option D:
Option D is correct because it groups A, B and C, the three true statements, and excludes D, which confuses name resolution with security. This combination accurately reflects networking basics relevant for ICT.

An IP address uniquely identifies a host or interface on a network using the Internet Protocol so that data packets can be routed correctly. It functions like a digital address, enabling communication between devices. Without IP addresses, the internet could not deliver information to specific destinations. Therefore, the label described in the stem is an IP address.

Option A:
Option A, email address, identifies a mailbox for electronic mail services and not the network interface itself. It cannot be used by routers to forward packets.

Option B:
Option B is correct because IP address is the standard term for the numerical identifier assigned to devices using the Internet Protocol.

Option C:
Option C, MAC address, refers to a hardware address assigned to network interfaces at the data link layer and is distinct from IP addressing at the network layer.

Option D:
Option D, URL link, specifies the location of web resources and is not used for addressing devices in packet routing.

Statements A, B and C correctly explain common ICT abbreviations, while statement D is incorrect. URL, HTML and IP address are standard terms related to web addressing, markup and logical identification of devices. ISP actually stands for Internet Service Provider, not Internet Service Password. Therefore, the set of correct statements consists of A, B and C only.

Option A:
Option A is correct because it includes precisely the three true statements and excludes D. It aligns with widely accepted definitions of URL, HTML and IP address. By not accepting the wrong expansion of ISP in statement D, this option remains factually accurate.

Option B:
Option B is incorrect because it lists only A and B as correct, leaving out C. Statement C is also true, since IP addresses uniquely identify devices at the logical level. Any correct answer must include all three true statements.

Option C:
Option C is incorrect because it groups B, C and D as correct. While B and C are accurate, D is wrong, as ISP does not stand for Internet Service Password. Including a false statement invalidates this combination.

Option D:
Option D is incorrect because it accepts all four statements as correct, thus endorsing the incorrect explanation of ISP in D. A valid answer must exclude that misdefinition.

An IP address uniquely identifies a device on an IP-based network and allows data packets to be routed correctly. It contains information that helps determine the network and host portions of the address. Both IPv4 and IPv6 formats serve this purpose. Hence the numeric label described in the stem is an IP address.

Option A:
Option A, access server, refers to a machine that provides connectivity or services to clients but is not a numeric label. It can possess an IP address but is a physical or virtual device rather than the address itself.

Option B:
Option B is correct because IP addresses are defined in networking standards precisely as numerical identifiers for interfaces or hosts. Without them, communication using the Internet Protocol cannot be properly directed.

Option C:
Option C, domain alias, relates to human-readable names managed by DNS and may map to IP addresses, but the alias itself is not the numeric label assigned by the protocol.

Option D:
Option D, internet service, is a broad term for facilities provided by an ISP or application and does not denote an addressing scheme.

Domain names such as “jrfnet.com” are human-friendly labels, while IP addresses are numerical identifiers used by routers and hosts. The Domain Name System (DNS) maps each domain name to its corresponding IP address so that when users type the name, the network can route packets to the correct server.

Option A:
This option correctly explains that DNS translates readable domain names into numerical IP addresses. Users work with names, but machines rely on the mapped IP numbers for routing packets on the Internet.

Option B:
This statement is false because domain names and IP addresses have different formats and purposes. A domain like “jrfnet.com” is not the same string as its numeric address, and the two are not interchangeable.

Option C:
Domain names are specifically designed to identify online resources such as websites, mail servers and other services. They are not labels for offline printed books, so this option misunderstands their role.

Option D:
IP addresses are stored in devices and routing tables and are actively used in communication. They are not just written on paper, so claiming they exist only on paper is incorrect.