Cisco Networking Basics

Private Addressing

1. 10.0.0.0 - 10.255.255.255
2. 172.16.0.0 - 172.31.255.255
3. 192.168.0.0 - 192.168.255.255

Access to Cisco Router

1. Console Port (Protocol: EIA/TIA-232)
2. Auxiliary Port (Protocol: EIA/TIA-232)
3. Telnet / Secure Shell (SSH)
4. HTTP / HTTPS Server
5. SNMP

Security Device Manager (SDM)

1. never try ...

Cisco Router Memory

1. RAM/DRAM
   
   • ...
2. NVRAM
   
   • nonvolatile RAM (memory that will retain information after losing power)
   • Cisco routers store a copy of the router's configuration file in NVRAM
3. Flash Memory
   
   • Differs from NVRAM in that it can be erased & reporgrammed as needed.
   • Store one or more copies of the IOS software
4. ROM
   
   • Hold a bootstrap program
   • When boot from ROM, the first thing you'll see is the romon>> prompt

Cisco Router Ports & Modules

1. Cisco routers come in 2 major parts
   
   • Chassis
     
     • The actual box and basic components inside it, such as power supply, fans, rear and front faceplates, indicator lights, and slots
   • Ports and modules
     
     • The printed circuit boards that slide into the router box
2. ...

Cisco Router Models

1. SOHO Routers
   
   • Cisco 90 series, 800 series, SB 100 series
2. Midrange Cisco Routers
   
   • 1700, 1800, 2600, 2800, 3600, 3700, 3800
3. Backbone Routers
   
   • 7200, 7300, 7500, 7600, 10700, 10000, 12000, CRS-1

Cisco IOS Feature Sets

1. IP Base
2. IP Voice
3. Enterprise Base
4. Advanced Security
5. Enterprise Services
6. Advanced IP Services
7. Advanced Enterprise Services

Software Product Variant

1. Basic
2. Plus
3. Enryption