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Networking-01: Introduction (Moving Data in Network (Protocol data unit…
Networking-01: Introduction
Peer-to-peer
Advantage
Less complexity
Lower cost
Easy to set up
Can be used for simple task
Disadvantage
No centralized administration
Not secure
Not scalable
Slow performance
Network Components
Media
Glass or plastic fibers
Wireless transmission
Metallic wires within cables
Services
Devices
End device
VoIP phone
Telepresence endpoint
Network printers
Security camera
Computers
Mobile handheld device
Intermediary device
Internetworking
Router
Security
Firewall
Network access
Wireless Access Point
Switch
Topology Diagrams
Physical topology diagram
Physical location
Configured ports
Cable installation
Intermediary device
Logical topology diagram
Devices
Ports
IP addressing scheme
Network Infrastructure
Factors
Number of users connected
Number and types of services available
Size of area covered
Area of responsibility
Types
Metropolitan Area Network (MAN)
Wireless LAN (WLAN)
Wide Area Network (WAN)
Storage Area Network (SAN)
Designed for
Support file server
Provide data storage, retrieval and replication
Involves
High-end servers
Multiple disk arrays (blocks)
Fibre Channel interconnection technology
Local Area Network (LAN)
Internet
Intranet
Extranet
Internet
Network Architecture
Basic characteristics
Scalability
Quality of Service
Fault tolerance
Security
Information security
Requirements
Maintain communication integrity
Endure availability
Ensure confidentiality
Securing a network infrastructure
Rules of Communication (Protocol)
Function
Message timing
How much information can be sent
When someone is able to send a message
Speed that it can deliver
Message size
Message delivery option
One destination
Multiple destination
All destinations in the same area
Message encoding
Decoding
Encoding
Message formatting and encapsulation
Depends on
Type of message
Channel used to deliver the message
Network Protocols and Standards
TCP/IP suite
Transport layer
Internet layer
Application layer
Network access layer
OSI Model
Presentation
Session
Application
Transport
Network
Data Link
Physical
Moving Data in Network
Encapsulation
De-encapsulation
Multiplexing
Protocol data unit (PDU)
Network layer
Frame
Physical layer
Header
Internet layer
Packet
Transport layer
Segment
Application layer
Data
Segmentation
Network Operating System
Steps
IOS copied from flash into RAM
IOS run from RAM
Device powered on
Interaction with shell
Command line interface (CLI)
Hierarchical structure
User EXEC mode
Privilege EXEC mode
Global configuration mode
Specific configuration mode
Interface
Line
Terminal emulation programs
SecueCRT
HyperTerminal
Tera Term
OS X Terminal
PuTTY
Ways to access
Remote
SSH
Stronger password authentication
Use encryption when transporting session data
AUX
Telnet
Console
Graphical User Interface (GUI)
Cisco
Cisco Internetwork Operating System (IOS)