ELN DAY 1 Flashcards
Documents and controls network changes for equipment, hardware, and software throughout the network’s life cycle. Configuration management exists in all aspects of IT to include software, hardware, programming, and security.
Configuration Management
Accounting management gathers usage statistics for billing and accounting purposes. Administration management tracks users, their passwords, permissions, operations of network equipment, and backups.
Accounting/ Administration Management
Detects, runs diagnostics tests, isolates, and corrects network faults to include error log maintenance. Includes execution of operational tests to ensure network software and equipment is functioning within standards. This feature is closely related to performance management.
Fault Management
Encompasses the evaluation and reporting of networked equipment functionality.Performance management gathers and maintains historical logs of statistical information.
Performance Management
Protects a network from unauthorized access. A set of features keeps users from creating or deleting services relevant to controlled information and protects functions that control the distribution of cryptographic keying.
Security Management
Cisco uses a three-layer hierarchical model to help design and maintain a network. This model is logical and not necessarily physical.
The Cisco Model
the core of the network, responsible for directing traffic with only speed and reliability in mind. The only purpose of the core layer is to transport data as fast as possible.
Core Layer
The communications point between the core and access layers occurs at the Distribution layer. The distribution layer provides routing, filtering, and access to the WAN
Distribution Layer
The Access layer controls access to intra-network resources, which are usually locally available to users. If remote access is needed, the distribution layer handles that traffic.
Access Layer
- Power-On Self-Test(POST)
- Loads bootstrap from ROM
- Load IOS from flash memory into RAM
- Load configuration from NVRAM(startup-config) into RAM (running-config)
Boot Process
Manually interrupts the boot process. Users do not normally interact except when performing tasks such as reinstalling IOS software or recovering passwords.
ROMMON
Local,command-line access through a terminal emulation program. (Out-of-band management)
Console Port
Remote, command-line access through a modem. It is also used as a console port. (Out-of-band management)
Auxiliary Port
Remote, logical access using Application Layer protocols such as Telnet or SSH. These protocols are used to connect to any active interface on the router. (In-band management)
VTY Lines
Provides access to basic monitoring commands and is used to view statistics. The prompt is device hostname and greater than ( > ) sign.
Router>
User Exec
0 - 1
Provides access to all other router commands. Accessed with the enable command. The prompt is device hostname and pound ( #)sign.Router#
Privileged Exec
2 - 15
Commands(changes) entered in this mode (global command) affect the entire system as a whole. The prompt is device hostname, (config), and pound ( # ) sign.
Global Configuration
Commands (changes) entered in this mode affect specific interfaces or processes. The prompt displayed depends on what is being configured. If an interface is being configured, the prompt is hostname, (config-if), and pound ( # ) sign.
Specific Configuration
An interactive configuration dialog, used when no startup-config exists in NVRAM, such as when a router/switch is turned on for the first time. Another way to enter setup mode is when a privileged user enters the setup command.
Setup
Allows manual hostname entry.
hostname
config commands
Configures service port parameters
line
config commands
Allows system administrator to manually change or configure interface connections.
interface
config commands
Allows configuration of IP addresss chemes.
ip
config commands
Allows system administrator to enter user accounts.
username
config commands
Allows another user with a different privilege level to login.
login
config commands
