It 320 Hw 1.1 Essay

1166 Words Feb 7th, 2013 5 Pages
John McGee
IT 320
HW assignment 1.1
Vocabulary Exercise: Matching on page 3 1. Wide Area Network (WAN):
A network that spans a large geographic area. 2. Router:
Connects LAN’s to WAN’s 3. Default Gateway:
If a device does not know how to get to a destination, it sends data to this device. 4. Leased Line:
A WAN link contracted for use by the customer. 5. Telephone Company:
A WAN service provider. 6. Serial Cable:
Connects a router to a CSU/DSU. 7. Channel service unit/ Data service unit (CSU/DSU):
Equipment that is located in the customer’s wiring closet and provides a clocking signal to the router. 8. Data circuit terminating equipment (DCE):
When referring to clocking, the CSU/DSU is this
…show more content…
Instead of using a hard drive, routers use two types of memory to permanently store data: flash memory and nonvolatile RAM (NVRAM).
The main internal router components are as follows:
Random access memory (RAM), which stores routing tables and the configuration file while the router is powered. It loses content when a router is powered down or restarted.
NVRAM, which provides storage for the startup configuration file and retains content when a router is powered down or restarted.
Flash memory, which is a type of EEPROM. It holds the software image and retains content when a router is powered down or restarted.
Read only memory, which maintains instructions for power on self test diagnostics and stores bootstrap program and basic operating system software.
Interfaces, which connect routers to a network for packet entry and exit.
Flash memory is used for the storage of the operating system software image. The router normally acquires the default IOS from flash. These images can be upgraded by loading a new image into flash. The IOS can be in uncompressed or compressed form. In most routers, an executable copy of the IOS is transferred to RAM during the boot process.
The three basic types of connections on a router are WAN interfaces, LAN interfaces, and fast Ethernet ports. The term interface specifically refers to physical connectors that forward packets. In contrast, the term port refers to a

Related Documents