Application Layer Flashcards
(19 cards)
- Q: What are the main functions of the application,presentation and session layers?
They provide network services, format and present data, and manage connections between applications.
- Q: What is a network protocol?
A set of rules that governs data transmission, reception, and processing in a network.
- Q: What does DNS do?
Resolves human-readable domain names to IP addresses.
- Q: What is Telnet used for?
Remote access to servers and networking devices via a text interface.
- Q: What is DHCP?
A protocol that dynamically assigns IP addresses and other network settings to devices.
- Q: What is HTTP used for?
Transferring files (HTML, images, etc.) that make up web pages
- Q: What is the purpose of FTP?
To transfer files between computers using client-server architecture.
- Q: How does TFTP differ from FTP?
TFTP is simpler, connectionless, and often used for bootstrapping devices.
- Q: What is SMTP?
A protocol used to send emails from clients or between mail servers.
- Q: What does POP do?
Downloads emails from a server and deletes them from the server.
- Q: What is IMAP’s advantage over POP?
Keeps messages on the server and allows access from multiple devices.
- Q: What does the GET method in HTTP do?
Requests data from a server.
- Q: What do the HTTP POST and PUT methods do?
Upload data or update content on the server.
- Q: What does nslookup do?
Queries DNS servers to resolve domain names or troubleshoot DNS issues.
- Q: What is a top-level domain (TLD)?
The last part of a domain name, e.g., .com, .org, .jp.
- Q: What are the two FTP connections?
One for commands and replies, and one for actual file transfer.
What are the port numbers for SMTP, POP3, and IMAP?
SMTP - 25, POP3 - 110, IMAP - 143
What port does HTTP use? What about HTTPS?
HTTP - 80, HTTPS - 443
Why is static IP addressing used for devices like servers?
To ensure consistent, reachable addresses for critical network services.
