In certain situations, it may be desirable for a client to reconnect repeatedly to the same real server, rather than have an LVS load balancing algorithm send that request to the best available server. Examples of such situations include multi-screen web forms, cookies, SSL, and FTP connections. In these cases, a client may not work properly unless the transactions are being handled by the same server to retain context. LVS provides two different features to handle this: persistence and firewall marks.