Case Study 3 Medi Bill Services

MediBill Services, Inc., started out providing billing support and services for a small community of independent medical offices. These offices used MediBill to service medical claims and provide patient data storage. After five years of service, MediBill has decided to grow and provide online medical information and Internet access to service its expanding client base. The company also is looking to provide the security for file transfers for disaster recovery purposes. MediBill is looking to...

FDDI Frame Format

The FDDI frame format is similar to the format of a Token Ring frame. FDDI frames can be as large as 4500 bytes. There is a token and a data frame format. Figures D-15 and D-16 show these formats. The following is an explanation of the fields in Figures D-15 and D-16 Preamble Used to prepare a station for an incoming frame. SD (starting delimiter) Used to indicate that an incoming frame follows. FC (frame control) Contains control information. Used to indicate whether this is a data or token...

Apple Talk Address Resolution Protocol See AARP

AppleTalk Remote Access. See ARA. AppleTalk Transaction Protocol. See ATP. AppleTalk Update-Based Routing Protocol. See AURP. AppleTalk zone. See zone. application layer. Layer 7 of the OSI reference model. This layer provides services to application processes (such as electronic mail, file transfer, and terminal emulation) that are outside the OSI model. The application layer identifies and establishes the availability of intended communication partners (and...

Differentiating Performance Tests Versus Real Network Performance

What comprises a performance test How does one interpret results How does one compare the results to any realistic performance requirements The more common performance tests include blasting traffic from an input port to an output port of a device. For a given device, injecting traffic through multiple input ports to multiple output ports on the same device gives aggregate performance numbers. Usually, these tests are performed on Ethernet because Ethernet-based testers were the first...

Cisco Internet and Intranet Solutions

Small- and medium-sized companies seeking to remain competitive must leverage the Internet as a business asset. From simple electronic mail to marketing and customer service information, the Internet is changing the way everyone does business. Cisco solutions support a variety of Internet and intranet applications. At its most basic, Internet access is the process of connecting a private local-area network to the Internet. Most small- and medium-sized businesses rely upon an Internet service...

Case Study 3 Cartoon Works

CartoonWorks, Inc., is a graphical firm specializing in animation for the advertisement and entertainment industries. This firm is growing quickly and needs to remain competitive. The firm just completed a strategy meeting to decide how each department can contribute to create a corporation that will give the company an edge in the market. Ms. Roberts, the Director of IS for CartoonWorks, Inc., is responsible for all LAN and WAN implementations. She has proposed networking CartoonWorks' remote...

Cisco Telecommuting and Remote User Solutions

As advances in digital communications shrink time and distance, a new model of the workplace is taking shape. The modern office is no longer contained within a structure instead, it is mobile and geographically scattered. The twenty-first century workplace is becoming any place where work is done. Companies must provide remote access to e-mail and other network resources to telecommuters and remote users. Telecommuting can be a valuable tool for recruiting and retaining key personnel in today's...

IEEE 8023 Frame Format

The IEEE produced their Ethernet standard in June 1983. They changed the type field to a length field and added the Logical Link Control (LLC) layer. Figure D-4 shows the IEEE 802.3 frame format. The remainder of this section discusses the fields in the IEEE 802.3 frame format. The IEEE defined the preamble to be a string of 1s and 0s that is 7 bytes long. The following byte is the Start Frame Delimiter (SFD) Following the SFD are the DA and SA fields, with MAC addresses. The length field...

About the Technical Reviewers

David Barnes is a Network Consulting Engineer for Cisco Systems in Dallas, Texas. He is a Cisco Certified Design Professional, MCSE+Internet, and Master CNE. David specializes in large-scale network design and optimization. He has designed, implemented, and managed networks for numerous Fortune 500 companies during the past 10 years. Kevin S. Mahler, CCNP and CCDA, is the National Wide-Area Network and Network Operations Center manager for the American Cancer Society. Kevin's teams are...

Three Part Firewall System

The classic firewall system, called the three-part firewall system, has the following three specialized layers, as shown in Figure 4-10 An isolation LAN that is a buffer between the corporate internetwork and the outside world. (The isolation LAN is called the demilitarized zone (DMZ) in some literature.) A router that acts as an inside packet filter between the corporate internetwork and the isolation LAN. Another router that acts as an outside packet filter between the isolation LAN and the...

Step 4 Develop a Test Plan

Now that you have prepared to create the prototype, the next step is to create the test plan that will be used on the prototype. The best tool available to a designer is a topology map of the prototype test network. This one diagram can be used to view the entire network and can be the single most important document of a prototype. On this diagram, you can include major configuration parameters such as network speeds, topology information, WAN line speeds, and descriptions of specific network...

Cisco Works2000

The CiscoWorks2000 family of products is based on Internet standards for managing Cisco enterprise networks and devices. Resource Manager Essentials provides a browser-based tool set for managing Cisco devices, integrating Internet-based information, and providing links to third-party products to deliver the management intranet. CWSI Campus adds a suite of applications that are designed for managing Cisco Catalyst and LightStream switches it offers configuration, traffic, logical viewing, and...

Cisco 1600 Series Access Routers

The Cisco 1600 series, with modular features, is optimized to meet the needs of small remote offices. Cisco 1600 series routers connect small offices with Ethernet LANs to the Internet and to company intranets using several WAN technologies ISDN, asynchronous serial, and synchronous serial, including Frame Relay, leased lines, Switched 56, SMDS, and X.25. Optional WAN interface cards add flexibility and growth opportunities. The Cisco 1600 series routers are part of the Cisco Networked Office...

Cisco 2500 Series Access Routers Servers

The Cisco 2500 series of routers is the world's most popular brand of branch office router, providing a variety of models designed for branch office and remote site environments. Cisco 2500 series key features include the following Full suite of Cisco IOS software ClickStart software, providing installation in minutes using any Web browser from any desktop platform CiscoWorks Windows software, allowing remote management and maintenance from a central location Flash and DRAM memory upgrade...

C

C class IP addresses, 201-202, 525-526 subnetting, 202-203 supernetting, 206-207 cable modems, 162 cable ranges, 533 cable television, 384 cable testers, 272 cable-range command, 223 coaxial cables, 389 drop cables, 405 fiber-optic cables, 416 LANs Ethernet, 122-123, 547 Fast (100 Mbps) Ethernet, 124-130 FDDI, 131-132 Fiber Ethernet, 123-124 Gigabit (1000 Mbps) Ethernet, 131 Token Ring, 130 shielded cables, 482 WANs, 162-164 circuit switching, 166 Frame Relay, 164-165 leased lines, 166 packet...

Case Study 2 Pages Magazine

Phillips is the newly appointed Director of IT at Pages Magazine, Inc. Pages Magazine realizes that to aggressively compete in its market, this company needs changes to its infrastructure that will support new applications and Internet access, allowing them to increase their productivity and to follow market trends. Pages wants to use the Internet to gain clients and find new opportunities. Ms. Phillips is faced with many options but needs your help in developing a solution that is both...

Characterizing Traffic Loads and Behaviors

The tables in this section cover the different broadcasts and traffic patterns that affect the network. The information in these charts can vary depending on use, but you can use these tables to understand the relative values and to understand the impact on the network. In comparison, plain-text information is generally smaller than multimedia or illustrative information because of the screen image. For a multimedia or illustrative application, you must transfer not only the color and the data,...

CCIE Professional Development

Kennedy Clark, CCIE Kevin Hamilton, CCIE 1-57870-094-9 AVAILABLE NOW This volume provides an in-depth analysis of Cisco LAN switching technologies, architectures, and deployments, including unique coverage of Catalyst network design essentials. Network designs and configuration examples are incorporated throughout to demonstrate the principles and enable easy translation of the material into practice in production networks. Alvaro Retana, CCIE Don Slice, CCIE and Russ White, CCIE 1-57870-097-3...

L

Layer 2 Forwarding Protocol. A protocol that supports the creation of secure virtual private dial-up networks over the Internet. label swapping. A routing algorithm used by APPN in which each router that a message passes through on its way to its destination independently determines the best path to the next router. LAN. local-area network. A high-speed, low-error data network covering a relatively small geographic area up to a few thousand meters . LANs connect workstations,...