Lab 7.1.1
Why is it impractical for an organization to own the entirety of a WAN?
There are no limitations on WANs so they can be custom built for the size of the organization.
Why is it favorable for an organization to maintain ownership of the entirety of the LAN?
Because the purpose of organizational expansion.
Table 7-1 WAN Physical Media
Media Infrastructure Summary
UTP Phone lines The quality of UTP may vary from telephone-grade wire to extremely high-speed cable. The cable has four pairs of wires inside the jacket. Each pair is twisted with a different number of twists per inch to help eliminate interference from adjacent pairs and other electrical devices.
Coaxial Television cable Coaxial cabling is difficult to install, it is highly resistant to signal interference. In addition, it can support greater cable lengths between network devices than twisted pair cable.
Fiber-optic Connecting networks between buildings. Uses a customized infrastructure to run dedicated connections; this is a costly option.
Electric power lines The bulk transfer of electrical energy. This type of media can be used with broadband over power lines (BPL), making use of the extensive infrastructure in place already.
Lab 7.1 Review
1. How can cables like UTP and coaxial cable be used for long-distance communication in a WAN infrastructure? Where are these cables used most often?
The quality of UTP may vary from telephone-grade wire to extremely high-speed cable. It uses most popular in school network. Coaxial can support great cable lengths between network devices. Coaxial cable has been popular in school networks, especially linear bus networks.
Lab 7.2.1
What are the benefits of using a dedicated leased line? What are the limitations of using a dedicated leased line?
Leased line have many advantages such as high speeds, fast uploads, good reliability, and better support. The limitations are the cost of using leased line and keep the line in good working order.
Lab 7.2 Review
Point to Point Protocol (PPP) is a data link protocol commonly used in establishing a direct connection between two networking nodes. It can provide connection authentication, transmission encryption and compression.
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