Cisco 7604 Configuration Guide - Page 722

Glossary Telnet A terminal emulation protocol for TCP/IP networks such as the Internet. Telnet is a common way to control web servers remotely; however, its security vulnerabilities have led to its replacement by SSH. TFTP Trivial File Transfer Protocol. TFTP is a simple protocol used to transfer files. It runs on UDP and is explained in depth in RFC 1350. TLS Transport Layer Security. A future IETF protocol to replace SSL. traffic policing The traffic policing feature ensures that no traffic exceeds the maximum rate (bits per second) that you configure, thus ensuring that no one traffic flow can take over the entire resource. transform set See IPSec transform set. translate, translation See xlate. transparent firewall A mode in which the FWSM is not a router hop. You can use transparent firewall mode to simplify mode your network configuration or to make the FWSM invisible to attackers. You can also use transparent firewall mode to allow traffic through that would otherwise be blocked in routed firewall mode. See also routed firewall mode. transport mode An IPSec encryption mode that encrypts only the data portion (payload) of each packet, but leaves the header untouched. Transport mode is less secure than tunnel mode. TSP TAPI Service Provider. See also TAPI. tunnel mode An IPSec encryption mode that encrypts both the header and data portion (payload) of each packet. Tunnel mode is more secure than transport mode. tunnel A method of transporting data in one protocol by encapsulating it in another protocol. Tunneling is used for reasons of incompatibility, implementation simplification, or security. For example, a tunnel lets a remote VPN client have encrypted access to a private network. Turbo ACL Increases ACL lookup speeds by compiling them into a set of lookup tables. Packet headers are used to access the tables in a small, fixed number of lookups, independent of the existing number of ACL entries. U UDP UMTS Unicast RPF URL User Datagram Protocol. A connectionless transport layer protocol in the IP protocol stack. UDP is a simple protocol that exchanges datagrams without acknowledgments or guaranteed delivery, which requires other protocols to handle error processing and retransmission. UDP is defined in RFC 768. Universal Mobile Telecommunication System. An extension of GPRS networks that moves toward an all-IP network by delivering broadband information, including commerce and entertainment services, to mobile users via fixed, wireless, and satellite networks Unicast Reverse Path Forwarding. Unicast RPF guards against spoofing by ensuring that packets have a source IP address that matches the correct source interface according to the routing table. Uniform Resource Locator. A standardized addressing scheme for accessing hypertext documents and other services using a browser. For example, http://www.cisco.com. GL-20 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM OL-20748-01