TCP & UDP Questions Flashcards
1
Q
FTP purpose and port number
A
- File Transfer Protocol
- Transfers files between systems
- Authenticates with a username and password
- TCP/20
- TCP/21
2
Q
DNS purpose and port number
A
- Domain Name System
- Turns names into IP Addresses
- UDP/53
3
Q
HTTPS purpose and port number
A
- Hypertext Transfer Protocol Secure
- Web server communication with encryption
- TCP/443
4
Q
NetBIOS/NetBT purpose and port number
A
- Allows computers and applications to communicate with network hardware, and allows data to transmit properly over a network.
- UDP/137/138/139
5
Q
HTTP purpose and port number
A
- Web server communication
- TCP/80
6
Q
SLP purpose and port number
A
- View list of available servers
- TCP/427
- UDP/427
7
Q
SSH purpose and port number
A
- A secure protocol for remote logins
- A user can connect to a server to transfer information
- TCP/22
8
Q
POP3 purpose and port number
A
- Used to receive mail
- TCP/110
9
Q
Telnet purpose and port number
A
- Login to devices remotely
- Not encrypted
- TCP/23
10
Q
SMB/CIFS purpose and port number
A
- File sharing between computer using it
- Commonly used by Microsoft computers
- TCP/445
11
Q
AFP purpose and port number
A
- File sharing between computer using it
- Used by Apple computers
- TCP/548
12
Q
SMTP purpose and port number
A
- Used to send mail
- TCP/25
13
Q
DHCP purpose and port number
A
- Auto config of IP address, subnet mask and other options
- UDP/67/68
14
Q
RDP purpose and port number
A
- Share a desktop from a remote location
- TCP/3389
15
Q
LDAP purpose and port number
A
- Store and retrieve information in a network directory
- TCP/389
16
Q
SNMP purpose and port number
A
- Used to manage devices on a network
- UDP/161/162
17
Q
Difference between TCP and UDP?
A
TCP - Transmission Control Protocol (
- Reliable delivery, there are possesses to make sure things go through the network with little problems. - "Flow Control" When data is received, the sender is notified so the amount of data sent is managed. If data isnt received the sender is notified and it resends.
UDP - User Datagram Protocol (Connectionless, this means no “call” is made. Data is sent with no hellos or goodbyes)
- Unreliable delivery meaning no error recovery and no acknowledgement is sent back from the receiver. - No "Flow Control" The sender determines the amount of data transmitted.
