Explain why early application protocols like FTP and Telnet are considered insecure today. Applications can send data using a connection-oriented or connectionless method. Which is the correct description of the difference between them? Connectless is when data is sent using a wireless network. Connection-oriented networks use a physical link like fibre-optic cables. Connectionless transport is more reliable than connection-oriented as it does not have the overhead of making a connection. Connection-oriented transport is faster than connectionless as it does not have the overhead of guaranteeing reliability. Connectionless transport is faster than connection-oriented as it does not have the overhead of guaranteeing reliability. Connectionless transport is used when reliability is required and connection-oriented is used when speed is required. Which is the correct 32 bit value for the IP address of 150.237.89.121 (whois.net.dcs.hull.ac.uk)? (Spaces have been added at the byte boundaries for clarity) 01111001010110011110110110010110 11101101010110010111100110010110 None of the bit patterns are correct. Email uses in-band signalling. What are the issues that this causes for email: the email cannot contain SMTP or RFC821 commands in the email message the email cannot contain RFC822 headers in the message body the email cannot contain a dot at the start of a line of text the email cannot contain a line with only a dot the email cannot contain a line starting with > From RFC822 specified all email must contain certain headers. What is a minimal set of headers permitted: From, To, Subject, Date Sender, To, Subject, Date From, To, Subject From, Bcc, Date Cc, Bcc, From, Subject