Computer Networks And Internet Protocol - Week 2 | Assignment 2 : Answer with Explanation
Computer networks and internet protocols are essential components of today's technology-driven world. They allow devices to connect and communicate with one another, enabling the sharing of information and resources. Multiple choice questions (MCQs) on this topic test a student's understanding of the various concepts and protocols involved in computer networks and internet communication. These include topics such as Application Layer II – Domain Name Systems, Application Layer III – The Web , Application Layer IV – Hypertext Transfer Protocol , Application Layer IV – Internet Mail Transfer , Application Layer V – File Transfer (FTP)
A “web Browser” is an HTTP Client.
a. Trueb. False
Answer
a. True
- HTTP is the protocol that supports communication between web browsers and web servers.
- A “Web Server” is a HTTP server
- A “Web Browser” is a HTTP client
- A web browser is a software application that is used to retrieve, present, and traverse information resources on the World Wide Web.
- It acts as an HTTP client, sending HTTP requests to web servers and displaying the HTTP responses, which are usually web pages, in a format that can be easily viewed by users.
Which of the following are the correct HTML tags?
a. <hr>b. <ar>...</ar>
c. <a>__</a>
d. <img>...</img>
Answer
Options a, c are correct.
a. <hr> is correct, it creates a horizontal rule (a line).
b. <ar>...</ar> is incorrect, there is no such HTML tag.
c. <a>...</a> is correct, it creates a hyperlink.
d. <img>...</img> is incorrect, the correct syntax is <img src="image_file.extension" alt="description">.
-img is Empty tag – no closing tag
- Components of Img tag :
<img src="url“ alt = “description of image” />
Which of the following statement(s) is/are true with respect to MIME ?
(i) It is embedded between Email Body and Header
(ii) It transforms non-ASCII data to Network Virtual Terminal ASCII data
a. Only (i)
b. Only (ii)
c. Both (i) and (ii)
d. Either (i) or (i)
Answer
c. Both (i) and (ii)
Both statements are true with respect to MIME (Multipurpose Internet Mail Extensions).
(i) Located between the Email Header and Bo and header as a way of extending the capability of email to handle non-text attachments, such as images and audio files, as well as to support character sets other than ASCII.
- MIME Located between the Email Header and Body
(ii) -MIME transforms non-ASCII data at the sender side to NVT 7-bit data and delivers it to the client SMTP.
- MIME transforms non-ASCII data into ASCII data that can be transmitted over the Internet, as most email systems at the time of its creation could only handle ASCII data. MIME uses a variety of encoding schemes to ensure that the data arrives at its destination intact and in its original form.
int domain name refers to
a. Business useb. informational sites
c. international organizations
d. None of this
Answer
c. international organizations- ".int" is a top-level domain used exclusively by international inter-governmental organizations (IGOs) established by treaty.
- The domain name int is a sponsored top-level domain (sTLD) in the Domain Name System of the Internet.
Which of the following statement(s) is/are true for File Transfer Protocol ?
(i) FTP uses port 21
(ii) Control connection is used by FTP to send messages to the client in response to control
commands
a. Only (i)
b. Only (ii)
c. Both (i) and (ii)
d. Neither (i) nor (ii)
Answer
c. Both (i) and (ii)
- The FTP client initiates control connection,
to port 21.
- The control connection is the
connection across which the FTP server will send messages to the client in response to these control commands
- Control connection is used by FTP to send control commands and receive messages to/from the client.
Is pqr.gov.ac.in a fully qualified domain name?
a. Trueb. False
Answer
b. False
- A domain name is considered to be complete if it ends in a dot and is referred to as a fully qualified domain name (FQDN) or an absolute domain name.
- The domain name does not end in a “dot”. Hence it is not fully qualified
What is the command used by DNS to translate a fully qualified domain name into its corresponding IP address?
a. iplookupb. nssearch
c. ipconfig
d. nslookup
Answer
d. nslookup
- When an application needs some information from the server, it invokes the DNS name resolver.
- The nslookup command returns the DNS server's fully qualified domain name into its corresponding IP address.
Which of the following is/are not an Application Layer protocol(s) ?
a. HTTPb. SFTP
c. UDP
d. SNMP
Answer
c. UDP : The User Datagram Protocol (UDP) is a Transport Layer protocol. UDP is part of the Internet Protocol suite, also known as the UDP/IP suite.
Application Layer protocol(s)
- Domain Name System (DNS)
- File Transfer Protocol (FTP)
- Hypertext Transfer Protocol (HTTP)
- Simple Mail Transport Protocol (SMTP)
- Simple Network Management Protocol (SNMP)
- Telnet
- Dynamic Host Configuration Protocol (DHCP)
- SFTP (Secure File Transfer Protocol) is the advanced version of FTP(file transfer protocol)
What is the de-factoctory path for storing MIB files in Linux Operating System?
a. /usr/share/snmp/mibsb. /usr/home/snmp/mibs
c. /usr/share/smtp/mibs
d. /usr/home/smtp/mibs
- Management Information Bases ( MIBs)
- MIB is a text file that describes managed objects using the syntax of ASN.1 (Abstract Syntax Notation 1)
Answer
a. /usr/share/snmp/mibs
- On Linux systems, mib files are typically stored in the /usr/share/snmp/mibs directory. However, the exact location may differ depending on the distribution used.
Which port is used by the HTTPS servers?
a. 22b. 80
c. 443
d. 8080
Answer
The port used by HTTPS servers is c. 443.
- HTTP is assigned port 80, which is used to connect different users to an insecure network.
- HTTPS is a secure protocol that allows encrypted communication between the server and the browser via port 443.
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