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Chapter:1 Explore The Network, AHMAD FAKHRURIZZUDIN BIN AHMAD FAIRUZ -…
Chapter:1
Explore The Network
1.2 Classify Network Protocols and Communication
The purpose of the Cisco IOS:
Cisco calls its operating system the Cisco Internetwork Operating System or Cisco IOS.
The Cisco IOS provides the following network services:
◦ Basic routing and switching functions
◦ Reliable and secure access to networked resources
◦ Network scalability
Purpose of OS
Using a GUI enables a user to:
◦ Use a mouse to make selections and run programs
◦ Enter text and text-based commands
Using a CLI on a Cisco IOS switch or router enables a network technician to:
◦ Use a keyboard to run CLI-based network programs
◦ Use a keyboard to enter text and text-based commands
There are many distinct variations of Cisco IOS:
◦ IOS for switches, routers, and other Cisco networking devices
◦ IOS numbered versions for a given Cisco networking devices
Overview of Network
1.LAN
2.DEVICES
3.MEDIA
DEVICES:
Laptop
Printer
Wireless Tablet
MEDIA:
Cable
Wireless
Operating System:
All electronic devices require an operating system.
◦ Windows, Mac, and Linux for PCs and laptops.
◦ Apple iOS and Android for smart phones and tablets.
◦ Cisco IOS for network devices (e.g., switches, routers, wireless AP, firewall, …).
IOS Modes
1.User EXEC Mode
2.Privileged EXEC Mode (enable mode)
3.Global Configuration Mode
User EXEC mode
The user EXEC level does not allow any commands that
might change the configuration of the router.
The user EXEC mode can be identified by the “>" prompt
Privileged EXEC mode
This mode can be configured to require a password from the user before accessing it.
The privileged EXEC mode can be identified by the "#"
prompt.
Global Configuration mode
To enter configuration mode, enter the command configure terminal from privileged mode.
Configuration mode has various submodes,starting with global configuration mode, which can be identified by the (config)# prompt following the router name.
Cisco CLI
The Cisco IOS command-line interface (CLI) is the primary user interface used for configuring, monitoring, and maintaining Cisco devices.
This user interface allows you to directly and simply execute Cisco IOS commands, whether using a router console or terminal, or using remote access methods.
What is the maximum distance that the media can succesfully cary a signal?
Network media is the actual path over which an electrical signal travels as it moves from one component to another.
Into what type of environment will the media be installed?
Local-area network (LAN): A network infrastructure that provides access to users and end devices in a small geographical area. Wide-area network (WAN): A network infrastructure that provides access to other networks over a wide geographical area.Metropolitan-area network (MAN): A network infrastructure that spans a physical area larger than a LAN but smaller than a WAN (e.g., a city). MANs are typically operated by a single entity, such as a large organization.Wireless LAN (WLAN): Similar to a LAN but wirelessly interconnects users and endpoints in a small geographical area. Storage-area network (SAN): A network infrastructure designed to support file servers and provide data storage, retrieval, and replication. It involves high-end servers, multiple disk arrays (called blocks), and Fibre Channel interconnection technology.
What is the amount of data and the speed at which it must be transmitted?
K = kilo = 1,000 bits
M = mega = 1,000 kilo = 1,000,000 bits
G = giga = 1,000 mega = 1,000,000,000 bits
T = tera = 1,000 giga = 1,000,000,000,000 bit
What is the cost of the media and installation?
To find the CPI in any year, divide the cost of the market basket in year t by the cost of the same market basket in the base year. The CPI in 1984 = $75/$75 x 100 = 100 The CPI is just an index value and it is indexed to 100 in the base year, in this case 1984. So prices have risen by 28% over that 20 year period
AHMAD FAKHRURIZZUDIN BIN AHMAD FAIRUZ