Describe the similarities and differences between these utilities:
a. scp and ftp
b. ssh and telnet
a. Similarities:
? Can transfer one or more files at a time
? Can authenticate as a different user
Differences:
? scp—Encrypts the optional password and encrypts data
ftp—Does not encrypt
? scp—Uses one port
ftp—Uses two ports: a command channel and a data channel
? scp—Uses multiple authentication options
ftp—Has a single authentication option
? ftp—Can translate the end of text lines
? scp—Provides binary transfer only
? scp—Can perform recursive copies
ftp—Copies single or multiple files, or the contents of a single directory;
not recursive
b. Similarities:
? Can authenticate as a different user
? Can log in to a remote or local machine
? Can use a port other than the default
Differences:
? ssh—Uses encryption
telnet—Uses cleartext
? ssh—Provides multiple authentication options
telnet—Provides user/password authentication
? ssh—Can tunnel other ports/protocols (such as X11)
? ssh—Can execute remote commands
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