Lesson 1 Review Questions
1. What is the purpose of a Network Operations Center (NOC)?
The purpose of a NOC is to manage and supervise all network operations. The NOC is a focal point for network troubleshooting and maintenance. It contains workstations that are configured to display all activities and functions of the networks being monitored.

2. Your company is using P2P technology to distribute software. Where is this software stored?
Software is stored on the hard drives of thousands of computers worldwide.

3. Name at least three products that are often called flavors of UNIX.
Linux, Sun Solaris, and FreeBSD are three products that are often call flavors of UNIX.

4. What three elements are common to all networks
Protocols, transmission median and network services are three elements that are common to all networks.

5. List the seven OSI/RM layers, beginning with Layer 7.
Application, Presentation, Session, Transport, Network, Data Link, and Physical.

6. Why is it important for operating system venders to consider the OSI/RM when developing networking software?
The OSI/RM allows systems from various venders to communicate with one another. Significant deviance from the OSI/RM will result in communication failures.

7. What is the difference between routable and non-routable protocols?
Routable protocols can pass through a router and can travel through LANs and WANs. Non-routable protocols use predefined routes that cannot be changed.

8. Name the two types of twisted-pair cable, and the two varieties of wire available for each.
Shielded twisted-pair cable (STP) and unshielded twisted-pair cable (UTP). They both come in either stranded wire or solid wire.

9. What are the two major types of fiber-optic cables?
Single mode and Multi Mode

10. A network administrator suspects a security problem on a wireless network, and has changed the SSID on the wireless access point. How will existing wireless network clients be affected?
The existing wireless network clients will no longer be able to communicate with the rest of the LAN. The SSID will need to be changed on all wireless network clients that associate with that wireless AP.

11. What is Virtualization
Virtualization is a software technology that enables you to run multiple virtual operating systems and applications on a single physical computer. The operating systems and applications share the resources of the single computer across multiple environments.