Chapter 8: Review Questions - Local Area Networks - Part II

What are the nine most common groups of network utility software?

1. Antivirus software 2. Anti-spam software 3. Anti-spyware software 4. Backup software 5. Crash protection software 6. Network-monitoring software 7. Remote access software 8. Security assessment software 9. Uninstall software

What are the primary functions of an Internet Web page server?

Web servers receive requests for web pages, retrieve the appropriate Web page, and transmits the requested Web page back across the Internet to the browser.

What are the basic functions of a network operating system?

Support server and printer operations; Allow users to log on; User accounting procedures; All normal operating system functions (disk/memory/CPU/peripheral management) Network Security & Authentication

What is the function of OES / NetWare's NDS?

Acts as an intelligent system that authenticates users and includes a distributed database of information about every application, user, server, and resource on a network which essentially allows administrators to manage all files, users, and resources in a powerful and efficient manner.

What distinguishes a multitasking operating system from a non-multitasking operating system?

Multitasking can allow users to "run" or execute multiple applications and processes at the same time.

What different kinds of servers are available?

Network, Media, File, E-Mail, Web, Print, Storage, Application, Database, Telecommunications, Telephony, and Messaging / SMS as well as others exist as: 1. Server boxes 2. Server blades 3. Server appliances.

What are the different levels of RAID, and what does each do?

RAID 0: striping RAID 1: mirroring RAID 3: striping with error checking on separate disk RAID 5: striping with error checking stored with data

What is the primary advantage of a wireless LAN?

The strongest advantage of a wireless LAN is that no cabling is necessary for the user device to communicate with the network.

What is a Basic Service Set?

The transmission area surrounding a simple access point in a wireless local area network; it resembles a cell in a cellular telephone network.

List the six basic functions of an operating system.

1. Manages all programs and resources 2. Handles Input/Output 3. Handles security 4. Provides memory management 5. Provides storage management 6. Communicates status of system

List the types of software license agreements.

1. Single user-single station 2. Single user-multiple station 3. Interactive user 4. Network server 5. Site 6. Corporate 7. GPL 8. Freeware 9. Shareware 10. Trial 11. Educational/Student Use

What are the issues often stated in a software license agreement?

1. Software installation and use—Specifies the number of computers on which a user may legally install and use the software. 2. Network installation—Indicates if the package may be installed on a computer network; and if so, whether additional licenses are necessary for each machine on the network. 3. Backup copy—Informs the user if making a backup copy is acceptable. 4. Decompilation—Specifies that a user may not decompile, disassemble, or reverse engineer the software code in an attempt to retrieve its high-level language to make modifications to the code. 5. Rental statement—States that a user is not allowed to rent or lease the software to a third party. 6. Upgrades—If the software program is an upgrade of a previous version, informs the user that the previous version needs to be purchased before the upgrade can be installed. 7. Copyright—Informs the user that all documentation, images, and other materials included in the package are copyrighted and under the protection of copyright laws. 8. Maintenance—Informs the user whether product support is included in the purchase of the software package.

What is the difference between NAS and a SAN?

A NAS is a a computer system which provides both network storage and the file system to control the storage whereas a SAN is a storage system that allows users to store files on a network but it does not control the file system.

What is an application programming interface?

A software module that acts as an interface between application programs and technical entities, such as telephone switching system.

What is meant by disk mirroring?

A technique used in RAID systems in which data is duplicated onto two drives simultaneously in order to provide a backup for the data or simply splitting data over multiple disk drives.

What is an organizational unit?

An object in a hierachical tree structure for local area network operating system that is composed of further objects or leaf objects.

List the current versions of wireless LAN technology.

IEEE 802.11 - The original 1 Mbit/s and 2 Mbit/s, 2.4 GHz RF and IR standard IEEE 802.11a - 54 Mbit/s, 5 GHz standard (1999, shipping products in 2001) IEEE 802.11b - Enhancements to 802.11 to support 5.5 and 11 Mbit/s (1999) IEEE 802.11g - 54 Mbit/s, 2.4 GHz standard (backwards compatible with b) (2003) IEEE 802.11n - Higher throughput improvements ----------------------------------------------------------------------------------- IEEE 802.11 - The original 1 Mbit/s and 2 Mbit/s, 2.4 GHz RF and IR standard IEEE 802.11a - 54 Mbit/s, 5 GHz standard (1999, shipping products in 2001) IEEE 802.11b - Enhancements to 802.11 to support 5.5 and 11 Mbit/s (1999) IEEE 802.11d - international (country-to-country) roaming extensions(New countries) IEEE 802.11e - Enhancements: QoS, including packet bursting IEEE 802.11F - Inter-Access Point Protocol (IAPP) IEEE 802.11g - 54 Mbit/s, 2.4 GHz standard (backwards compatible with b) (2003) IEEE 802.11h - 5 GHz spectrum, Dynamic Channel /Frequency Selection (DCS/DFS) and Transmit Power Control (TPC) for European compatibility IEEE 802.11i (ratified 24 June 2004) - Enhanced security IEEE 802.11j - Extensions for Japan IEEE 802.11k - Radio resource measurements IEEE 802.11n - Higher throughput improvements IEEE 802.11p - WAVE - Wireless Access for the Vehicular Environment (such as ambulances and passenger cars) IEEE 802.11r - Fast roaming IEEE 802.11s - Wireless mesh networking IEEE 802.11T - Wireless Performance Prediction (WPP) - test methods and metrics IEEE 802.11u - Interworking with non-802 networks (e.g., cellular) IEEE 802.11v - Wireless network management

What is the difference between CSMA/CA and CSMA/CD?

In CSMA/CA there is no collision detection since the transmitter does not listen during it's transmission to hear if there was a collision with another signal somewhere on the network primarily due to the absence of wires and ability to measure or listen for signals being transmitted on them. The second difference is that CSMA/CA implements collision avoidance by waiting to transmit for short periods of time called interframe spacing to verify that after it has requested to send data, it receives a clear to send reply from the access point which helps avoid collisions.

What are the main advantages of Windows Server 2000 over NT Version 4?

It introduced Microsoft's answer to Netware NDS called Active Directory which allowed it to create a hierarchical structure of resources. Allowed for management of resources on a macro level instead of on a one-by-one basis. More powerful, flexible, and manageable

What are the strengths of UNIX?

Streamlined which provides for quick operation. Internal code of UNIX is relatively easy to modify. Early versions were free and most still are. Runs on most any hardware. Stable and good at support large applications such as multiuser database systems and web servers. Excellent security Network/Client Support

List the reasons for Linux's popularity.

Linux: Shares speed and stability features on UNIX and If downloaded from the Internet, the software is free. You usually receive the original source code along with the compiled code for free. Small size of source code and ability to install on almost any device. Graphical User Interface Network Support and Integration

What are the different types of hardware support devices for local area networks?

Many types of hardware devices are necessary to support a local area network, including hubs, switches, and routers; uninterruptible power supplies and surge protectors; tape drives; network attached storage; printers and print servers; media converters; workstations; and servers.

What is the function of Window's Active Directory?

Network directory structure for Window Server or operating system; a hierarchical structure that stores information about all the objects and resources in a network and makes this information available to users, network adminstrators, and application programs.

List the primary differences between a network operating system and an operating system.

Network operating system manages network servers, printers, multiple networks, and potentially large numbers of local and remote users while an operating system is usually only managing a single machine with a few users who log on locally, although roaming profiles are becoming more prevalent.

What are the advantages of Mac OS X Server?

Provides support for secure access to Windows, Linux, and Unix and it's Open Directory can interface with Active Directory.

What is the function of a server?

The computer that stores software resources such as the network operating system, computer applications, programs, data sets, and databases, and performs one or more network-type services for attached clients.

What are the differences between Windows Server 2008 and Windows Server 2000?

Windows Server 2008 added: 1. Expanded Active Directory including certificate, identity, and rights management services) 2. Contains a new server core allowing for it to act as a number of different types of servers, including virtual server 3. Self-healing file server that can fix corrupted files and/or folders and Clustering. 4. Improved processing speed. 5. Advancements in network security.