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� TCP requires all data packets to be delivered for the data to be usable. � The acknowledgment process of TCP introduces delays that break the streams of data. � UDP does not have mechanisms for retransmitting lost packets. � UDP tolerates delays and compensates for them. � TCP is a connectionless protocol that provides [...]

� server farm � enterprise edge � enterprise campus � service provider edge

� TCP is more reliable than UDP because it requires lost packets to be retransmitted. � TCP requires less processing by the source and destination hosts than UDP. � UDP introduces delays that degrade the quality of the data applications. � TCP ensures fast delivery because it does not require sequencing or acknowlegements.

� providing Internet, telephone, and WAN services to the enterprise network � providing a connection point for end-user devices to the enterprise network � providing high-speed backbone connectivity with redundant connections � providing intrusion detection and intrusion prevention to protect the network against malicious activity � providing packet inspection to determine if incoming packets should [...]

� It provides web-like access to company information for employees only. � It limits access to corporate information to secure VPN or remote access connections only. � It allows customers and partners to access company information by connecting to a public web server. � It allows suppliers and contractors to access confidential internal information using [...]

� forwards traffic that is destined for other networks � isolates network problems to prevent them from affecting the Core Layer � allows end users to access the local network � provides a connection point for separate local networks � transports large amounts of data between different geographic sites � forwards traffic to other hosts [...]

� performs routing and packet manipulation � supplies redundancy and failover protection � provides a high-speed, low-latency backbone � serves as a network connection point for end-user devices

� An enterprise WAN is designed to interconnect local LANs, while an enterprise extranet is designed to interconnect remote branch offices. � An enterprise WAN is designed to interconnect branch offices, while an enterprise extranet is designed to give access to external business partners. � An enterprise WAN is designed to provide remote access for [...]

� VPN � NAT � user authentication � client firewall software � packet sniffing

� remove the three-layer hierarchical model and use a flat network approach � divide the network into functional components while still maintaining the concept of Core, Distribution, and Access Layers � provide services and functionality to the core layer by grouping various components into a single � component located in the access layer � reduce [...]