Term
| What cabling and settings (Baud Rate, Data Bits, Parity, Stop Bits, Flow Control) are used for a terminal session to the console port? |
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Definition
Cabling: Rollover
Baud Rat: 9600
Data Bits: 8
Parity: None
Stop Bits: 1
Flow Control: None
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Term
What kind of cable connects:
WAN connection from router to router
LAN connect between routers
from host NIC to router
from host NIC to switch
from router to switch
switch to another switch
switch to hub
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Definition
router to router over WAN - serial
NIC/router to router - crossover
NIC/router to switch - straight-through
switch to switch/hub - crossover |
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Term
Describe the pinouts of the following cables: rollover straight through crossover |
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Definition
rollover: pins 1-8 connected to 8-1 respectively straight through: pins 1-8 connected to 1-8 crossover: pins 1-3 & 2-6 are connected, the rest connected straight through
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Term
Name the acronym: NVRAM What is it's characteristics and what is typically stored there? |
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Definition
Non-Volatile RAM Does not lose data stored on it when power is off. Used to store the startup configuration |
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Term
| What are the basic steps of the boot process? |
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Definition
1. POST runs basic inventory/test of hardware 2. Bootstrap/RXBoot/Rommon used to find the IOS 3. IOS loaded to RAM 4. Startup configuration or remote configuration found 5. Configuration loaded to RAM as running config
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Term
| What is the process used to find the IOS image to load during bootup? |
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Definition
Following steps are followed until valid IOS is found:
1. Checks config-register (assuming 0x2102)
2. Bootstrap checks the startup-config in NVRAM for boot system commands.
3. Device looks for the first IOS image in flash.
4. Broadcast for TFTP server.
5. Load RXBoot mini-IOS (used to manually connect to TFTP server)
6. ROMMON mode loaded (used to manually load/TFTP an image) |
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Term
| What is the process for loading the configuration at bootup? |
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Definition
Following steps are attempted until one is successful:
1. If startup-config is in NVRAM, it is copied as the running config 2. Broadcast for TFTP server for a configuration file 3. Launch setup mode
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Term
| What are the ways to exit setup mode? |
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Definition
Crtl+C Answer "no" when asked to enter initial configuration dialog or when prompted to save at the end |
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Term
Describe the effects of the following config register settings:
0x2100
0x2101
0x2102
0x2142 |
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Definition
0x2100 : always boot to ROMMON
0x2101 : always boot to RXBOOT
0x2102 : Boot as per startup config. If no startup config, boot to first image in flash (0x210n = boot to nth image)
0x2142 : do not load startup-config during boot |
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Term
| What is the process to force boot into ROMMON mode? |
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Definition
1. Connect via console port 2. Power cycle the device 3. Ctrl+Break at the start of boot sequence |
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Term
| What is the process to run password recovery for a Cisco device? |
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Definition
Boot/break into ROMMON mode via console
Set "confreg 0x2142" (skip check for startup config)
Reload & exit from setup mode
"copy start run"
Change or set passwords
"copy run start"
Set "config-register 0x2102"
Reload
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Term
| What differs "enable secret" from "enable password" |
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Definition
| "enable secret" is encrypted while "enable password" stored as plain text |
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Term
| What IOS command will apply encryption to passwords for console, vty/tty lines? |
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Definition
| service password-encryption |
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Term
| What is the process to enable SSH on IOS? |
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Definition
1. configure "username xxx password yyy" 2. setup "ip domain-name zzz" 3. run "crypto key generate rsa" 4. apply "login local" and "transport input ssh" on the vty lines
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Term
What is the name format for IOS image files?
Eg. C2500-D-L.120-9.bin |
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Definition
[platform]-[feature set]-[run location|compression].[version]
Eg. C2500-D-L.120-9.bin
Platform: C2500
Feature Set: D
Run Location: L
IOS version: 12.0(9) |
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Term
Name the telnet session commands to:
determine existing sessions
resume the last session
resume a specific session
disconnect the last session
close an active session
suspend a session
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Definition
determine existing sessions: "show sessions"
resume session: Enter, "resume", "resume [session|host|ip]"
disconnect the last session: disconnect
close an active session: "exit"
suspend a session: Ctrl+Shift+6, x |
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Term
| What is the command(s) to view L3 information obtained by CDP? |
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Definition
"show cdp neighbors detail" (functionally equivalent to "show cdp entry * ") |
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Term
| What are the options available with a non-extended ping command? |
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Definition
| protocol, destination IP, repeat count, datagram size, timeout (seconds) |
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Term
| What additional options are available with an extended ping command? |
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Definition
Source IP/interface, Type of Service, DF bit, validate reply, data pattern (hex), loose/strict/record/timstamp/verbose, sweep range of sizes |
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Term
| What procedure is used to connect to a factory default SDM installation for initial config? |
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Definition
1. crossover cable connects PC to Gig0/0
2. point browser to http://10.10.10.1
3. login credentials are cisco/cisco |
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Term
| What information does CDP supply about a neighboring device? |
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Definition
Device Identifier (eg. hostname)
Port Identifier (port/interface)
Address list (L3 and L2)
Capabilities list
Platform
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Term
| What exec level command sends pings to each device on the path to a destination host? |
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Definition
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Term
| What is the command to view the previous commands entered in IOS? |
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Definition
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