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Cisco_1_1

Cisco_1_1. Common Networking Devices. Router. Wireless Router. Secure Router. Firewall. Home Office. Workgroup Switch. Access Point. IP Phone. Mobile Access Phone. Small Business. Wireless Connectivity. Line: Serial. Line: Ethernet. Cisco Icons and Symbols. What Is a Network?.

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Cisco_1_1

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  1. Cisco_1_1 Common Networking Devices

  2. Router WirelessRouter Secure Router Firewall Home Office Workgroup Switch Access Point IP Phone Mobile Access Phone SmallBusiness WirelessConnectivity Line: Serial Line: Ethernet Cisco Icons and Symbols

  3. What Is a Network?

  4. Common Physical Components of a Network

  5. Resource-Sharing Functions and Benefits • Data and applications • Resources • Network storage • Backup devices

  6. Physical Topology Categories

  7. Logical Topologies

  8. Threat Capabilities—More Dangerous and Easier to Use

  9. Data Encapsulation

  10. Data De-Encapsulation

  11. Layer 1 Devices • Layer 1 provides the physical media and its encoding. • Examples: • Ethernet • Serial • Repeater • Physical interface of the NIC

  12. Layer 2 Devices • Layer 2 devices provide an interface with the physical media. • Examples: • NIC • Bridge • Switch

  13. Layer 2 Addressing • MAC address • Assigned to end devices

  14. Layer 3 Devices and Their Function • The network layer provides connectivity and path selection between two host systems. • In the host, this is the path between the data link layer and the upper layers of the NOS. • In the router, it is the actual path across the network.

  15. Layer 3 Addressing • Each NOS has its own Layer 3 address format. • OSI uses an NSAP. • TCP/IP uses IP.

  16. ARP Table

  17. Host-Based Tools: ping

  18. Host-Based Tools: tracert

  19. Local Area Network

  20. LAN Components • Computers • PCs • Servers • Interconnections • NICs • Media • Network devices • Hubs • Switches • Routers • Protocols • Ethernet • IP • ARP • DHCP

  21. Functions of a LAN • Data and applications • Share resources • Provide communication path to other networks

  22. LAN Sizes

  23. Network Interface Card

  24. Comparing Ethernet Media Requirements

  25. Differentiating Between Connections

  26. 1000BASE-T GBIC

  27. Cisco Fiber-Optic GBICs • Short wavelength (1000BASE-SX) • Long wavelength/long haul (1000BASE-LX/LH) • Extended distance (1000BASE-ZX)

  28. Unshielded Twisted-Pair Cable • Speed and throughput: 10 to 1000 Mb/s • Average cost per node: Least expensive • Media and connector size: Small • Maximum cable length: Varies

  29. RJ-45 Connector

  30. RJ-45 Jack

  31. UTP Implementation (Straight-Through) Cable 10BASE-T/ 100BASE-TX Straight-Through Straight-Through Cable Pin Label Pin Label 1 2 3 4 5 6 7 8 TX+ TX- RX+ NC NC RX- NC NC 1 2 3 4 5 6 7 8 TX+ TX- RX+ NC NC RX- NC NC Wires on cable endsare in same order.

  32. UTP Implementation (Crossover) Cable 10BASE-T or 100BASE-TX Straight-Through Crossover Cable EIA/TIA T568A EIA/TIA T568B Pin Label Pin Label 1 2 3 4 5 6 7 8 TX+ TX- RX+ NC NC RX- NC NC 1 2 3 4 5 6 7 8 TX+ TX- RX+ NC NC RX- NC NC Some wires on cableends are crossed.

  33. UTP Implementation: Straight-Through vs. Crossover

  34. Using Varieties of UTP

  35. CISCO IOS SOFTWARES

  36. Cisco IOS Software • Features to carry the chosen network protocols and functions • Connectivity for high-speed traffic between devices • Security to control access and prohibit unauthorized network use • Scalability to add interfaces and capability as needed for network growth • Reliability to ensure dependable access to networked resources

  37. Configuring Network Devices • Initial default settings are sufficient for the switch to operate at Layer 2 as a switch. • A Cisco device will prompt for initial configuration if there is no configuration in memory. • Additional configuration tasks set up the device with the following: • Protocol addressing and parameter settings • Options for administration and management

  38. An Overview of Cisco Device Startup

  39. External Configuration Sources • Configurations can come from many sources. • Configurations will act in device memory.

  40. CLI is used to enter commands. Operations vary on different internetworking devices. Users type or paste entries in the console command modes. Command modes have distinctive prompts. Enter key instructs device to parse and execute the command. Two primary EXEC modes are user mode and privileged mode. Cisco IOS User Interface Functions

  41. Cisco IOS Software EXEC Mode (User) There are two main EXEC modes for entering commands.

  42. Cisco IOS Software EXEC Mode (Privileged)

  43. Switch Command-Line Help Facilities

  44. Context-Sensitive Help

  45. Context-Sensitive Help (Cont.)

  46. Router Command History

  47. Viewing the Configuration

  48. show running-config and show startup-config Commands Displays the current and saved configuration

  49. Q&A

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