Course Content
Networking Today
0/7
Network Components
Network Representations and Topologies
Common Types of Networks
Internet Connections
Reliable Networks
Network Security Basic
Network Trends
Basic Switch and End Device Configuration
0/7
Cisco IOS Access
Cisco IOS Navigation
Cisco IOS Command Structure
Basic Cisco Device Configuration
Save Cisco IOS Configurations
Ports and Addresses
Configure IP Addressing
Protocols and Models
0/7
The Rules in Network Communications
Protocols
Protocol Suites
Standards Organizations
Reference Models
Data Encapsulation
Data Access
Physical Layer
0/6
Purpose of the Physical Layer
Physical Layer Characteristics
Copper Cabling
UTP Cabling
Fiber-Optic Cabling
Wireless Media
Data Link Layer
0/3
Purpose of the Data Link Layer
WAN and LAN topologies
Data Link Frame
Ethernet Switching
0/4
Ethernet Frames
Ethernet MAC Address
The MAC Address Table
Switch Speeds and Forwarding Methods
Network Layer
0/5
Network Layer Characteristics
IPv4 Packet
IPv6 Packet
How a Host Routes
Router Routing Tables
Number Systems
0/2
Binary Number System
Hexadecimal Number System
Address Resolution
Explain how ARP and ND enable communication on a network
0/3
MAC and IP
ARP
Neighbor Discovery
Basic Router Configuration
0/3
Configure Initial Router Settings
Configure Interfaces
Configure the Default Gateway
IPv4 Addressing
0/7
IPv4 Address Structure
IPv4 Unicast, Broadcast, and Multicast
Types of IPv4 Addresses
Network Segmentation
Subnet an IPv4 Network
VLSM
Structured Design
IPv6 Addressing
0/8
IPv4 Issues
IPv6 Address Representation
IPv6 Address Types
GUA and LLA Static Configuration
Dynamic Addressing for IPv6 GUAs
Dynamic Addressing for IPv6 LLAs
IPv6 Multicast Addresses
Subnet an IPv6 Network
ICMP
0/2
ICMP Messages
Ping and Traceroute Testing
Transport Layer
0/7
Transportation of Data
TCP Overview
UDP Overview
Port Numbers
TCP Communication Process
Reliability and Flow Control
UDP Communication
Application Layer
0/7
Application, Presentation, and Session
Peer-to-Peer
Web Protocols
Email Protocols
Dynamic Host Configuration Protocol (DHCP)
Domain Name Service
File Sharing Services
Network Security Fundamentals
0/4
Security Threats and Vulnerabilities
Network Attacks
Network Attack Mitigation
Device Security
Build a Small Network
0/7
Devices in a Small Network
Small Network Applications and Protocols
Scale to Larger Networks
Verify Connectivity
Host and IOS Commands
Troubleshooting Methodologies
Troubleshooting Scenarios
Basic Device Configuration
0/5
Configure a Switch with Initial Settings
Configure Switch Ports
Secure Remote Access
Basic Router Configuration
Verify Directly Connected Networks
CCNA: Switching, Routing, and Wireless Essentials
The second course in the CCNA curriculum focuses on switching technologies and router operations that support small-to-medium business networks and includes wireless local area networks (WLAN) and security concepts.
0/15
Switching Concepts
VLANs
Inter-VLAN Routing
STP
Etherchannel
DHCPv4
SLAAC and DHCPv6 Concepts
FHRP Concepts
LAN Security Concepts
Switch Security Configuration
WLAN Concepts
WLAN Configuration
Routing Concepts
IP Static Routing
Troubleshoot Static and Default Routes
CCNA: Enterprise Networking, Security, and Automation
The third CCNA course describes the architectures and considerations related to designing, securing, operating, and troubleshooting enterprise networks – including wide area network (WAN) technologies & quality of service (QoS) mechanisms for secure remote access, along with software-defined networking, virtualization, & automation concepts supporting network digitization.
0/14
Single-Area OSPFv2 Concepts
Single-Area OSPFv2 Configuration
Network Security Concepts
ACLs Concepts
ACLS for IPv4 Configuration
NAT for IPv4
WAN Concepts
VPN and IPsec Concepts
QoS Concepts
Network Management
Network Design
Network Troubleshooting
Network Virtualization
Network Automation
CCNA Course
About Lesson

Fiber-Optic Cabling

Describe fiber optic cabling and its main advantages over other media.

Properties of Fiber-Optic Cabling

  • Not as common as UTP because of the expense involved
  • Ideal for some networking scenarios
  • Transmits data over longer distances at higher bandwidth than any other networking media
  • Less susceptible to attenuation, and completely immune to EMI/RFI
  • Made of flexible, extremely thin strands of very pure glass
  • Uses a laser or LED to encode bits as pulses of light
  • The fiber-optic cable acts as a wave guide to transmit light between the two ends with minimal signal loss

Types of Fiber Media

Single-Mode Fiber

  • Very small core
  • Uses expensive lasers
  • Long-distance applications

  Multimode Fiber

  • Larger core
  • Uses less expensive LEDs
  • LEDs transmit at different angles
  • Up to 10 Gbps over 550 meters

 

Dispersion refers to the spreading out of a light pulse over time. Increased dispersion means increased loss of signal strength. MMF has greater dispersion than SMF, with a the maximum cable distance for MMF is 550 meters.

Fiber-Optic Cabling Usage

Fiber-optic cabling is now being used in four types of industry:

  • Enterprise Networks – Used for backbone cabling applications and interconnecting infrastructure devices
  • Fiber-to-the-Home (FTTH) – Used to provide always-on broadband services to homes and small businesses
  • Long-Haul Networks – Used by service providers to connect countries and cities
  • Submarine Cable Networks – Used to provide reliable high-speed, high-capacity solutions capable of surviving in harsh undersea environments at up to transoceanic distances.

Our focus in this course is the use of fiber within the enterprise.

Fiber-Optic Connectors

  • Straight-Tip (ST) Connectors

  • Lucent Connector (LC) Simplex Connectors

  • Subscriber Connector (SC) Connectors

  • Duplex Multimode LC Connectors

Fiber Patch Cords

  • SC-SC MM Patch Cord

  • LC-LC SM Patch Cord

  • ST-LC MM Patch Cord

  • ST-SC SM Patch Cord

A yellow jacket is for single-mode fiber cables and orange (or aqua) for multimode fiber cables.

Fiber versus Copper

Optical fiber is primarily used as backbone cabling for high-traffic, point-to-point connections between data distribution facilities and for the interconnection of buildings in multi-building campuses.

Implementation Issues UTP Cabling Fiber-Optic Cabling
Bandwidth supported 10 Mb/s – 10 Gb/s 10 Mb/s – 100 Gb/s
Distance Relatively short (1 – 100 meters) Relatively long (1 – 100,000 meters)
Immunity to EMI and RFI Low High (Completely immune)
Immunity to electrical hazards Low High (Completely immune)
Media and connector costs Lowest Highest
Installation skills required Lowest Highest
Safety precautions Lowest Highest

Other related topics

 

Topic Title Topic Objective
Purpose of the Physical Layer Describe the purpose and functions of the physical layer in the network.
Physical Layer Characteristics Describe characteristics of the physical layer.
Copper Cabling Identify the basic characteristics of copper cabling.
UTP Cabling Explain how UTP cable is used in Ethernet networks.
Fiber-Optic Cabling Describe fiber optic cabling and its main advantages over other media.
Wireless Media Connect devices using wired and wireless media.

 

 Other useful information

 

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