DNS (Domain Name System) Basics

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What is the main purpose of DNS?

To translate IP addresses into domain names

To provide security for internet connections

To create a hierarchical structure for the Internet

To map domain names to IP addresses (correct)

What is the role of the Resolver in DNS?

Creating top-level domains

Initiating DNS requests

Mapping names onto IP addresses (correct)

Partitioning domains into sub-domains

How are domains represented in the DNS name space?

Using hexadecimal notation

In a tree structure (correct)

As a matrix of IP addresses

As linear sequences of characters

What does cybersquatting refer to?

Selling registered domains at inflated prices Signup and view all the answers

Which part of the DNS name space represents domains with no sub-domains?

Leaf domains Signup and view all the answers

Why is it important for an application program to use DNS for domain name resolution?

To convert human-readable domain names into IP addresses Signup and view all the answers

What is a disadvantage of using HTTP for communication and data transfer?

High power requirement Signup and view all the answers

Why is HTTP considered less secure compared to HTTPS?

It does not use encryption methods like HTTPS Signup and view all the answers

What is a characteristic of HTTP pipe-lining?

Reduces latency by not requiring handshaking for subsequent requests Signup and view all the answers

Why does the client not close the connection until it receives complete data from the server in HTTP?

To ensure data completeness before closing the connection Signup and view all the answers

How does HTTP differ from HTTPS in terms of data security?

HTTP uses encryption like TLS Signup and view all the answers

What is the purpose of a URL in identifying web pages?

To uniquely identify each web page globally Signup and view all the answers

Which part of a URL uniquely indicates the specific web page?

The file name Signup and view all the answers

What does HTTP stand for in the context of web communication?

HyperText Transfer Protocol Signup and view all the answers

Why is a DNS name important in identifying web pages?

To uniquely identify the location of the page on the internet Signup and view all the answers

What role does a protocol play in a URL scheme?

Specifying how data should be transferred between systems Signup and view all the answers

Which part of a URL indicates the scheme for accessing the web page?

The protocol Signup and view all the answers

What is the term used to describe the query method where if a local server cannot satisfy a request, it forwards the query to the next server?

Recursive Query Signup and view all the answers

Which subsystem of e-mail systems allows people to read and send e-mails?

User Agents Signup and view all the answers

What function of e-mail systems involves moving messages from the originator to the recipient?

Transfer Signup and view all the answers

Which function of e-mail systems is related to informing the originator about what happened to the message?

Reporting Signup and view all the answers

In the context of e-mail systems, what does 'Composition' refer to?

Creating messages and answers Signup and view all the answers

What basic function of e-mail systems involves displaying incoming messages for users to read their email?

Displaying Signup and view all the answers