Most protocols (for example, HTTP, FTP) capable of authentication offer only inband authentication, meaning that the client must authenticate himself on the server. The advantage of inband authentication is that it is an internal part of the protocol, and most client applications support it. The disadvantage is that many protocols do not support any form of authentication, and those that do, support only a few authentication methods. Usually in an organization it is desirable to use only a single (strong) authentication method, however, not all protocols are suitable for all methods.