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NETW204 Week 1
Introduction to Routing
Question | Answer |
---|---|
A network device typically connected to a variety of LAN and WAN interfaces that forwards packets based on their destination IP addresses. | Router |
On a computer, a reference to an IP address on the same subnet, with that IP address being the IP address of a router. When the computer needs to send a packet to another subnet, it sends the packet to its default gateway. Also called a default router. | Default Gateway |
Used to determine the best path. Examines the destination IP address and searches for the best match with a network address in the router's routing table. | Routing Table |
Executes operating system instructions. Consists of Random access memory (RAM) (RAM contents lost when power is off). | CPU |
Diagnostic software used when router is powered up. Contains the router's bootstrap program. Is a scaled down version of operating system IOS. | Read-only memory (ROM) |
Stores startup configuration (including IP addresses and Routing protocol) | Non-volatile RAM (NVRAM) |
Contains the operating system (Cisco IOS) | Flash memory |
Used to view information about the router during the bootup process. | Show Version Command ( sho ver ) |
Used to display the routing table | Show Ip Route Command ( sho ip route ) |
Displays current configuration file | Show Running-Config Command ( sho run ) |
Displays any changes that the router performs when adding or removing routes | Debug Ip Routing Command |
Used to disable interfaces. | shutdown Command |
Is an information-gathering tool used by network administrators to get information about directly connected Cisco devices. | Cisco Discovery Protocol (CDP) |
A network accessed by a single route | Stub Network |
When the router has to perform multiple lookups in the routing table before forwarding a packet. | Recursive Route Lookup |
A single route that can be used to represent multiple routes | Summary Route |
Normally means one of the management ports used for administrative access | Port |
Normally refers to interfaces that are capable of sending and receiving user traffic. | Interface |
A network that is directly attached to one of the router interfaces. | Directly Connected Network |
The text-based interface on a Cisco router or switch. | Command-Line Interface (CLI) |
A network that is not directly connected to the router | Remote Network |
The process of how the router determines which path to use when forwarding a packet | Path Determination Function |
The process used by a router to accept a packet on one interface and forward it out another interface. | Switching Function |
A reference to the different parts of the Cisco IOS CLI. Different modes allow different kinds of commands (EXEC and configuration commands) and different subsets of these commands. | Mode |
Another term for user mode, with specific emphasis on the fact that this mode allows the user to enter EXEC commands instead of configuration commands. | User EXEC Mode |
An area of a Cisco router or switch CLI in which the user can issue the most powerful EXEC commands, including commands to configure the router, reload the router, and erase the configuration. | Privileged EXEC Mode |
An area of a Cisco router or switch CLI in which the user can enter global configuration -commands. | Global Configuration Mode |
The process of initializing a computing device. | Booting |
When a computer's power is first turned on, the hardware performs self-diagnostic testing of the hardware before it can load the OS into memory. This term refers to the power-on process and the self-testing (diagnostics). | Power-On Self Test (POST) |
A text name, useful for end users, that represents an IP address. DNS servers can be used resolve the name into the IP address it represents. | Hostname |
A list of the last several commands entered in CLI. These commands can be recalled to the command line by using the Up Arrow key or Ctrl-p, which saves typing effort when using the same commands repeatedly. | Terminal History |
In the Cisco router and switch CLI, an area of memory that holds the commands most recently used by that user. The commands are recalled to the command lone when the user presses the Up Arrow button or Ctrl-p. | History Buffer |