Networks Flashcards
What is FTP an abbreviation for? What is it?
File Transfer Protocol.
It is a high level protocol that operates on the application layer of the TCP/IP stack; it is an efficient way of transferring files across a network.
What is an FTP Client?
FTP Clients are software applications which sit on top of the FTP protocol; they are interacted with by the user, and they generate and send the appropriate FTP commands as required.
What is a remote server?
A remote server is the server which the user connects to when they use an FTP client.
Give some common FTP commands. What are their functions?
=> PWD - Print working directory
=> LIST - Return file or directory details
=> CPUP - Change to the parent directory
=> PASV - Enter passive mode
=> MKDIR - Create a new directory within the current directory
=> PUT - Copy one file from the local machine to the remote machine
What is a Mail Server?
A mail server acts like a virtual online post office for all incoming/outgoing email.
Whats does the abbreviation POP3 stand for? What is it and what does it do?
POP3 stands for ‘Post Office Protocol v3’.
This protocol retrieves emails from a mail server; removing them from the server and transferring them to the recipients device.
What does the abbreviation IMAP stand for? What does it do?
IMAP is the abbreviation for the Internet Message Access Protocol.
This protocol keeps emails on the mail server allowing synchronicity between devices.
What does the abbreviation SMTP stand for? What does it do?
SMTP is the abbreviation for the Simple Mail Transfer Protocol.
It transfers outgoing emails between servers (from an email client to a server).
What is a network protocol?
A set of rules or procedures for transmitting data across a network.
What is the TCP/IP stack?
The TCP/IP stack is a set of protocols that consists of four layers (Application/Transport/Network/Link) all working together.
What is a data packet?
A unit of data made into a single packet that can travel along a set network path.
Define an IP address.
An IP address is a unique string of characters that identifies each computer using the Internet Protocol (IP) to communicate over a network.
Describe a port.
A port is used to define which application on a device should receive a packet.
What is a socket?
A socket is the IP address of a given device as well as the port of the application on the device which is receiving data.
i.e. IP Address + Port = Socket (the IP address and port are separated by a ‘:’)
Define a MAC Address.
A MAC address is a totally unique 12-digit hexadecimal identifier that is hard-coded during the manufacturing process of all Network Interface Cards (NICs). They can be used to uniquely identify any device that is connected to a network.
