8 Chapter1·Introduction Table 1.1 Comparison of FTP, SCP, and SFTP FTP (File Transport Protocol) Utilizes Ports 20 and 21 TCP Clear text interactive file transfer High speed/low security 64 bit file space (large files over 4GB) Not easily used in batch files No hashing No industry encryption support SCP (Secure Copy) Utilizes port 22 TCP (SSH) Encrypted point-to-point file transfer Medium speed/high security 64 bit file space (large files over 4GB) Easily used in batch files Diffie-Hellman hashing DES, RC4 or AES, 3DES, ARCFOR (and other industry recommended standards) Requires Key Pair (PKI) SFTP (Secure File Transfer Protocol) Utilizes port 22 TCP (SSH) Encrypted interactive file transfer Low speed/high security 32bit file space (files less than 4GB) Not easily used in batch files Diffie-Hellman hashing DES, RC4 or AES, 3DES, ARCFOR (and other industry recommended standards) Requires Key Pair (PKI) Supports anonymous