CCNA 1 v6.0 Study Material – Chapter 4: Network Access

Chapter 4 – Sections & Objectives

  • 4.1 Physical Layer Protocols
    • Identify device connectivity options.
    • Describe the purpose and functions of the physical layer in the network.
    • Describe basic principles of the physical layer standards.
  • 4.2 Network Media
    • Identify the basic characteristics of copper cabling.
    • Build a UTP cable used in Ethernet networks (scope – does not include cabling area discussion).
    • Describe fiber-optic cabling and its main advantages over other media.
    • Connect devices using wired and wireless media.
  • 4.3 Data Link Layer Protocols
    Describe the purpose and function of the data link layer in preparing communication for transmission on specific media.
  • 4.4 Media Access Control
    • Compare the functions of logical topologies and physical topologies.
    • Describe the basic characteristics of media access control methods on WAN topologies.
    • Describe the basic characteristics of media access control methods on LAN topologies.
    • Describe the characteristics and functions of the data link frame.

4.1 Network Access

Physical Layer Protocols Physical Layer Connection

Types of Connections

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 1
CCNA 1 v6.0 Study Material - Chapter 4: Network Access 2

Network Interface Cards

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 3
CCNA 1 v6.0 Study Material - Chapter 4: Network Access 4

Physical Layer Protocols Purpose of the Physical Layer

  • The Physical Layer
    • Accepts a complete frame from the data link layer
    • Encodes it as a series of signals that are transmitted onto the local media
  • Physical Layer Media
    Describe the media types
  • Physical Layer Standards

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 5

Physical Layer Protocols Physical Layer Characteristics

  • Functions
    • Physical components
    • Encoding
    • Signaling
  • Data Transfer
    • Bandwidth – capacity to a medium to carry data
    • Throughput – measure of the transfer of bits across the media
  • Types of Physical Media

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 6

4.2 Network Media

Copper Cabling

  • Characteristics of Copper Cabling
    • Inexpensive, easy to install, low resistance to electric current
    • Distance and signal interference
  • Copper Media
  • Unshielded Twisted-Pair Cable
  • Shielded Twisted-Pair Cable
  • Coaxial Cable
  • Copper Media Safety
    Fire and electrical hazards

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 7

UTP Cabling

    • Properties of UTP Cabling
      • Cancellation of EMI and RFI signals with twisted pairs

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 8

    • UTP Cabling Standards
      • TIA/EIA-568
      • IEEE: Cat5, Cat5e, Cat6, Cat6e

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 9

    • UTP Connectors

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 10

    • Types of UTP Cable
      • Rollover
      • Crossover
      • Straight-through

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 11

  • Testing UTP Cables
  • Cable Pinouts

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 12

Fiber-Optic Cabling

    • Properties of Fiber-Optic Cabling
      • Transmits data over longer distances
      • Flexible, but thin strands of glass
      • Transmits with less attenuation
      • Immune to EMI and RFI
    • Fiber Media Cable Design

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 13

  • Types of Fiber Media
    Single mode and multimode
  • Fiber-Optic Connectors
  • Testing Fiber Cables
  • Fiber versus Copper

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 14

Wireless Media

  • Properties of Wireless Media
    – Data communications using radio or microwave frequencies
  • Types of Wireless Media
    – Wi-Fi, Bluetooth, WiMax
  • Wireless LAN
    – Wireless Access Point
    – Wireless NIC adapters

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 15

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 16

4.3 Data Link Layer Protocols

Purpose of the Data Link Layer

  • The Data Link Layer
    – What is this layer responsible for?
  • Data Link Sublayers
    – LLC communicates with the network layer
    – MAC defines the media access processes
  • Providing Access to Media
  • Data Link Layer Standards
    – IEEE
    – ITU
    – ISO
    – ANSI

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 17

4.4 Media Access Control

Topologies

  • Controlling Access to the MediaCCNA 1 v6.0 Study Material - Chapter 4: Network Access 18
  • Physical and Logical Topologies
CCNA 1 v6.0 Study Material - Chapter 4: Network Access 19
CCNA 1 v6.0 Study Material - Chapter 4: Network Access 20

WAN Topologies

  • Common Physical WAN Topologies
    – Point-to-pointCCNA 1 v6.0 Study Material - Chapter 4: Network Access 21– Hub and spoke

    CCNA 1 v6.0 Study Material - Chapter 4: Network Access 22

    – Mesh

    CCNA 1 v6.0 Study Material - Chapter 4: Network Access 23

  • Physical Point-to-Point Topology
  • Logical Point-to-Point Topology

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 24

LAN Topologies

  • Physical LAN Topologies
  • Half and Full Duplex
  • Media Access Control Methods
  • Contention-Based Access
    – CSMA/CD vs. CSMA/CA

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 25

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 26

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 27

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 28

Data Link Frame

  • The Frame
    – Header
    – Data
    – Trailer
  • Frame Fields
  • Layer 2 Address

  • LAN and WAN Frames
    – 802.11 Wireless Frame
    – PPP Frame
    – HDLC
    – Frame Relay
    – Ethernet Frame

CCNA 1 v6.0 Study Material - Chapter 4: Network Access 29

4.5 Chapter Summary

Summary

  • Explain how physical layer protocols and services support communications across data networks.
  • Build a simple network using the appropriate media.
  • Explain how the Data Link layer supports communications across data networks.
  • Compare media access control techniques and logical topologies used in networks.

Section 4.1 New Terms and Commands

  • Access Point (AP)
  • American National Standards Institute (ANSI) Bandwidth
  • CENELEC (European Committee for Electrotechnical Standardization)
  • CSA (Canadian Standards Association)
  • Copper cable
  • European Telecommunications Standards Institute (ETSI) Encoding
  • Federal Communication Commission (FCC) in the USA
  • Fiber-optic cable

  • Gigabits per second (Gb/s)
  • Goodput
  • Institute of Electrical and Electronics Engineers (IEEE)
  • Integrated Service Router (ISR)
  • International Organization for Standardization (ISO)
  • International Telecommunication Union (ITU)
  • Internet Engineering Task Force (IETF)
  • JSA/JIS (Japanese Standards Association)
  • Kilobits per second (kb/s)

  • Latency
  • Manchester encoding
  • Megabits per second (Mb/s)
  • Modulation
  • Network Interface Cards (NICs)
  • OSI Physical Layer
  • Signaling
  • Telecommunications Industry Association/Electronic Industries Association (TIA/EIA)
  • Throughput
  • Wireless
  • Wireless Local Network (WLAN)

Section 4.2 New Terms and Commands

  • Cancelation
  • Category 5 cable (Cat 5)
  • Enhanced Category 5 cable (Cat5e)
  • Category 6 cable (Cat6)
  • Category 6a cable (Cat6a)
  • Category 7 cable (Cat7)
  • Cladding
  • Coaxial
  • Coaxial cabling
  • Core
  • Coverage area
  • Crosstalk
  • Dispersion
  • Duplex Multimode LC Connector

  • Electromagnetic interference (EMI)
  • End gap
  • End finish
  • Enterprise networks
  • Fiber-to-the-home (FTTH)
  • Institute of Electrical and Electronics Engineers (IEEE)
  • Interference
  • Jacket
  • Lasers
  • Light Emitting Diodes (LEDs)
  • Long-haul networks
  • Misalignment
  • Multi-mode fiber (MMF)
  • Optical fiber cable

  • Radio frequency interference (RFI)
  • RJ45 connector
  • Rollover
  • Shared medium
  • Shielded twisted pair cabling (STP)
  • Signal attenuation
  • Single-mode fiber (SMF)
  • ST, SC, and LC fiber-optic connectors
  • Submarine networks
  • TIA 568A
  • TIA 568B
  • TIA/EIA 568 standard
  • Unshielded twisted pair (UTP)
  • Wireless Access Point (AP)
  • Wireless NIC adapters

Section 4.3 New Terms and Commands

  • American National Standards Institute (ANSI)
  • Data link layer (layer 2)
  • Ethernet interface
  • Frames
  • Institute of Electrical and Electronics Engineers (IEEE)
  • International Organization for Standardization (ISO)
  • International Telecommunication Union (ITU)
  • Logical Link Control (LLC)
  • Media Access Control (MAC)
  • Serial interface

Section 4.4 New Terms and Commands

  • 802.11 frame
  • 802.11 Wireless
  • Bus
  • Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
  • Carrier Sense Multiple Access/Collision Detection (CSMA/CD)
  • Collision
  • Contention-based access
  • Control
  • Controlled access
  • Cyclic Redundancy Check (CRC) value
  • Data
  • Error Detection

  • Ethernet
  • Extended Star
  • Frame Check Sequence (FCS) Frame Relay
  • Frame Relay
  • Frame start and stop indicator flags
  • Full-Duplex Communications
  • Half-Duplex Communications
  • HDLC
  • Header
  • Hub and Spoke
  • Logical Point-to-Point Topology
  • Logical Topology

  • Media Access Control
  • Media Sharing
  • Mesh
  • Physical Point-to-Point Topology
  • Physical Topology
  • Point-to-Point
  • Point-to-Point Protocol (PPP)
  • Quality of Service (QOS)
  • Ring
  • Star
  • Topology
  • Trailer
  • Type
  • Virtual circuit

Download Slide PowerPoint (pptx):


Related Articles

guest
2 Comments
Inline Feedbacks
View all comments
John
John
3 years ago

Thank-you for all your uploads,

This slide download link is broken.

Jojo
Jojo
3 years ago

Hello, there is just download-not-available.txt instead of PPTX file.
Thanks for solve.
Jojo