Chapter 8 - TCP/IP Application Flashcards
The protocol developed by Netscape for transmitting private documents over the Internet is known as _____.
SSL (Secure Socket Layer).
An SSL/TLS URL connection starts with which prefix?
https.
Which protocols are used to receive e-mails from servers?
IMAP & POP3.
What does NTP/SNTP stands for?
Network Time Protocol and Simple Network Time Protocol.
What does TFTP stands for?
Trivial File Transfer Protocol.
What does ICMP stands for?
Internet Control Message Protocol.
What does IGMP stands for?
Internet Group Message Protocol.
How many bits are in a port number?
16.
What is the range for well known port numbers?
0-1023.
What is the range for registered ports?
1024-49151.
What is the range for dynamics or private ports?
49152-65535.
For an internet application, what are the 3 security must have?
Authentication, Encryption and Nonrepudiation.
What protocol is used to send e-mail to a server?
SMTP.
What is the difference between active and passive FTP.
Active FTP and Passive FTP refer to different modes of data transfer in the File Transfer Protocol (FTP).
Active FTP:
In Active FTP, the FTP server initiates a connection to the client for data transfer. The client sends a PORT command to inform the server of the IP address and port number where it can connect for the data transfer. The server establishes the connection to the client’s specified port. Active FTP may encounter issues when the client is behind a firewall or Network Address Translation (NAT), as the server’s connection attempt may be blocked.
Passive FTP:
In Passive FTP, the client initiates both the control and data connections. The client sends a PASV (Passive) command to the server, which responds with an IP address and port number. The client then connects to this specified port for data transfer. Passive FTP is often more firewall-friendly, as the client determines the data connection, reducing issues related to firewalls and NAT.
In summary, the key difference lies in which party initiates the data connection: the server in Active FTP or the client in Passive FTP.
What port is used by HTTP?
80.
