Network services Flashcards
What are the client server roles?
File Client-File Server.
Web Client-Web Server.
Email Client-Email Server.
How many types of server software can a computer run?
How many clients can a computer server provide service to simultaneously?
Multiple forms of server sofwtare.
Multiple clients.
What do clients require to request and display the information from the server?
Software.
An example of client sofwtare is a web browser such as Chrome or Firefox.
What does DHCP mean?
What are DHCP servers used for?
Dynamic Host Configuration Protocol.
They are used to automatically assign IP addresses to clients on the network.
What does DNS mean?
What does DNS do?
Is DNS transparent?
Domain Name Service.
It translates strings into IP addresses. What is meant by this is that it translates information like ‘Youtube.co.uk’ into an IP address.
DNS is transparent as it is visible to the user.
What are print servers used for?
What are the three functions of a print server?
They are used to allow multiple users to a single printer.
Provide cleint access to print resources.
Administer print jobs by storing them in a que, until the print device is ready for them and then feeding or spooling the information to the printer.
Provide feedback to users.
What protocol allows for the user to transfer files between cleint and server?
FTP. File Transfer Protcol.
What is an FTP client?
A client that runs an application allowing for the pushing and pulling of files from a FTP Server.
How many connections are required for FTP?
Two.
One for commands and replies/control traffic.
Two for the actual file transfer.
FTP has many weaknesses, therefore which security transfer serviecs should be used? What are they?
FTPS. File transfer prtocol secure.
SFTP. SSH file transfer protcol.
SCP. Secure Copy.
How does FTPS work?
Allows for an FTP client to request that the file transfer session be encrypted.
This can be accepted or denied.
How does SFTP work? How about SCP?
An extension of Secure Shell. It is used to establish a secure file transfer session.
SCP also uses SSH to secure file transfers.
What are the three mail transfer protocols?
Simple Mail Transfer Protocol.
Post Office Protocol.
Internet Message Access Protocol.
How does the process of sending and recieving an email work?
It is sent using SMTP.
It is recieved using IMAP or POP.
What is a proxy server?
Hoes does it work?
A proxy server is a computer that has the authority to actas another. They are commonly used to either hide IP adresses or act as storage or cache for web pages that are frequently accessed by devices on the internal network.
- It intercepts the request.
- It checks to see if the websites contents have changed.
- If not, the proxy server responds to host with the web page.
