ccna module 14-15 exam answers

ccna module 14-15 exam answers.The security of network access. VPN is an encrypted connection technology between multiple private networks on a public network (e.g., the Internet) and is an extension of the corporate network over the Internet.19.1.2 Private WAN Infrastructure Remote Connectivity1 LeasedLine: A permanent communication circuit leased from an ISP between the customer's site and the ISP's WAN or between the customer's two sites. A leased line is usually called a private line because it provides a dedicated permanent service, while a WAN built with a leased line is usually called a private WAN. leased lines are usually paid monthly and are usually more expensive.2 IntegratedServicesDigitalNetwork (ISDN): a circuit-switched technology that allows the Public Switched Telephone Network (PSTN) to transmit digital signals over local loops, thereby enabling higher capacity switching Connectivity. There are two types of ISDN interfaces: Basic Rate Interface (BRI) and Primary Rate Interface (PRI). The PRI is the most used one, which can provide 23B channels + 1D channels with total bit rate up to 1.544 Mbps in North America, and 30B channels + 1D channels with total bit rate up to 2.048 Mbps in Europe, Australia and other parts of the world. VbIP. video conferencing and high-bandwidth connections with no latency and no jitter.3 Ethernet WAN: Carriers now offer Ethernet WAN services over fiber optic cabling. Ethernet WAN services have gone by many names, including MetroE, Ethernet over MPLS (EoMPLS), and VirtualPrivateLanService (VPLS). Ethernet WANs are now popular and used, while traditional FrameRelay and AsynchronousTransferMode (ATM) WAN links are rarely used.4 Very SmallAperture Terminal ( VSAT): A solution for creating a dedicated WAN using satellite communications. A VSAT is a small satellite dish, similar to those used for home Internet and TV. VSAT creates a dedicated WAN, while providing connectivity to remote locations.5 Multiprotocol Label Switching (MPLS): - A carrier technology, the most used technology at present is MPLSVPN. MPLS VPN refers to the use of MPLS technology to build an enterprise IP private network over the backbone broadband IP network to achieve cross-territory, secure, high-speed, and reliable multi-service communications for data, voice, and images, and to combine QoS services, traffic engineering, and other related technologies to combine the reliable performance, good scalability, and rich functionality of a public network with the security, flexibility, and efficiency of a private network.19.2 PPPoE Overview19.2.1 Introduction to PPPoEOperators want to connect multiple hosts at a remote location through the same access device, while the access device is able to provide access control and billing functions. Of the many access technologies available, the most economical way to connect multiple hosts to an access device is Ethernet, and the PPP protocol can provide good access control and billing capabilities, giving rise to the technology of transmitting PPP packets over Ethernet, the