1. E-mail is _________
a) Loss-tolerant application
b) Bandwidth-sensitive application
c) Elastic application
d) None of the mentioned
Explanation: Because it can work with available throughput.
2. Pick the odd one out.
a) File transfer
b) File download
c) E-mail
d) Interactive games
Explanation: File transfer, File download and Email are services provided by the application layer and there are message and data oriented.
3. Which of the following is an application layer service?
a) Network virtual terminal
b) File transfer, access, and management
c) Mail service
d) All of the mentioned
Explanation: The services provided by the application layer are network virtual terminal, file transfer, access and management, mail services, directory services, various file and data operations.
4. To deliver a message to the correct application program running on a host, the _______ address must be consulted.
a) IP
b) MAC
c) Port
d) None of the mentioned
Explanation: IP address lets you know where the network is located. Whereas MAC address is a unique address for every device. Port address identifies a process or service you want to carry on.
5. Which is a time-sensitive service?
a) File transfer
b) File download
c) E-mail
d) Internet telephony
Explanation: Internet telephony is Loss-tolerant other applications are not.
6. Transport services available to applications in one or another form _________
a) Reliable data transfer
b) Timing
c) Security
d) All of the mentioned
Explanation: The transport services that are provided to application are reliable data transfer, security and timing. These are very important for proper end to end services.
7. Electronic mail uses which Application layer protocol?
a) SMTP
b) HTTP
c) FTP
d) SIP
Explanation: Email uses various protocols like SMTP, IMAP and POP. The most prominent one used in application layer is SMTP.
8. The ____________ translates internet domain and host names to IP address.
a) domain name system
b) routing information protocol
c) network time protocol
d) internet relay chat
Explanation: Domain name system is the way the internet domain names are stored and translated to IP addresses. The domain names systems matches the name of website to ip addresses of the website.
9. Which one of the following allows a user at one site to establish a connection to another site and then pass keystrokes from local host to remote host?
a) HTTP
b) FTP
c) Telnet
d) TCP
Explanation: Telnet is used for accessing remote computers. Using telnet a user can access computer remotely. With Telnet, you can log on as a regular user with whatever privileges you may have been granted to the specific application and data on the computer.
10. Application layer protocol defines ____________
a) types of messages exchanged
b) message format, syntax and semantics
c) rules for when and how processes send and respond to messages
d) all of the mentioned
Explanation: Application layer deals with the user interface, what message is to be sent or the message format, syntax and semantics. A user has access to application layer for sending and receiving messages.
Why Computer Network ?
What's the Hype about the Application Layer?
Imagine your computer as a party animal, and the Application Layer is the VIP section. It's where your software applications, like browsers and email clients, grab a drink and mingle. This layer is all about making sure the right software gets access to the network and can communicate without any awkward silences.
Peeling the Layers of the Networking Onion
Now, our computer networking onion has layers – not the teary kind, but the informational ones! The Application Layer is the cherry on top, responsible for translating human-friendly requests (like typing in a website name) into something network-friendly (a bunch of numbers called IP addresses).
Human Talk vs. Computer Speak
Ever wondered how your Netflix binge-watch seamlessly streams? Thank the Application Layer for translating your desire to watch cat videos into a language the network understands. It's the ultimate translator, making sure your online wishes come true.
Why Should You Care?
Think of the Application Layer as the conductor of a digital orchestra, ensuring all the instruments (your apps) harmonize perfectly. Without it, your online experience would be like a symphony without a maestro – chaotic and confusing.
In a Nutshell
The Application Layer is the tech cupid, making sure your software love story with the network is nothing short of a blockbuster romance. Cheers to the unsung hero of the networking world – the Application Layer! Until next time, happy networking, fellow tech aficionados!