Leased Lines for WAN Infrastructure: Exam 200-125 Cisco Certified Network Associate Exam

Using Leased Lines for Your WAN Infrastructure

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Which two statements about using leased lines for your WAN infrastructure are true? (Choose two.)



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A. B. C. D. E. F.


Leased lines are dedicated point-to-point connections between two locations provided by a service provider. These lines can be used to connect a business's locations or to connect a business to the Internet or other networks. Here are the correct statements about using leased lines for your WAN infrastructure:

B. Leased lines with sufficient bandwidth can avoid latency between endpoints. Leased lines can provide a high-quality connection with low latency and little packet loss because they offer dedicated bandwidth that is not shared with other customers. This can be particularly important for applications that require real-time data transmission, such as video conferencing or voice over IP (VoIP). However, it's important to note that this statement is only true if the leased line has sufficient bandwidth to support the traffic demands.

D. Leased lines provide highly flexible bandwidth scaling. Leased lines can be provisioned to provide specific bandwidth levels to meet the needs of the business. For example, a business may start with a lower bandwidth leased line and then increase the bandwidth as needed. The ability to scale bandwidth quickly and easily is a significant advantage of leased lines.

The other statements are false:

A. Leased lines provide inexpensive WAN access. Leased lines are often more expensive than other WAN technologies, such as DSL or cable modem, because they offer dedicated bandwidth and high reliability. The cost of leased lines varies depending on the bandwidth and distance between the endpoints.

C. Leased lines require little installation and maintenance expertise. Leased lines require specialized installation and maintenance expertise. The service provider must install the necessary equipment, and businesses may need to hire trained technicians to install routers and other network equipment on their end of the connection. In addition, leased lines typically come with service-level agreements (SLAs) that require certain levels of uptime and performance, which can require ongoing monitoring and management.

E. Multiple leased lines can share a router interface. Leased lines are dedicated point-to-point connections, and each line requires its own interface on a router or other network device. It is not possible to share an interface between multiple leased lines.

F. Leased lines support up to T1 link speeds. Leased lines can support much higher bandwidths than T1, which has a maximum speed of 1.544 Mbps. Leased lines can provide bandwidths ranging from T1 speeds up to several gigabits per second, depending on the service provider and location.