31 Days Before Your CCENT Certification Exam: A Day-By-Day Review Guide for the ICND1 (100-101) Certification Exam

Allan Johnson entered the academic world in 1999 after ten years as a business owner/operator to dedicate his efforts to his passion for teaching. He holds both an MBA and an M.Ed in Occupational Training and Development. He taught CCNA courses at the high school level for seven years and has taught both CCNA and CCNP courses at Del Mar College in Corpus Christi, Texas. In 2003, Allan began to commit much of his time and energy to the CCNA Instructional Support Team providing services to Networking Academy instructors worldwide and creating training materials. He now works full time for the Academy in Learning Systems Development.

Introduction xxiii

Day 31: Network Devices, Components, and Applications 1

CCENT 100-101 ICND1 Exam Topics 1

Key Points 1

Devices 1

Switches 2

Routers 3

Physical Layer 4

Network Media Forms and Standards 4

LAN Device Connection Guidelines 6

LANs and WANs 7

Networking Icons 8

Physical and Logical Topologies 8

Cisco Borderless Network 9

Hierarchy in a Borderless Network 10

Network Documentation 11

Classification of Network Applications 12

User Application Interaction 12

Common Network Applications 13

Growth of Network-Based Applications 13

Quality of Service 14

Increased Network Usage 14

The Impact of Voice and Video on the Network 14

Study Resources 15

Day 30: Networking Models and Data Flow 17

CCENT 100-101 ICND1 Exam Topics 17

Key Points 17

The OSI and TCP/IP Models 17

OSI Layers 18

TCP/IP Layers and Protocols 19

Protocol Data Units and Encapsulation 20

The TCP/IP Application Layer 21

The TCP/IP Transport Layer 22

TCP Header 23

Port Numbers 23

Error Recovery 24

Flow Control 25

Connection Establishment and Termination 25

UDP 26

The TCP/IP Internet Layer 27

The TCP/IP Network Access Layer 27

Data Encapsulation Summary 29

Study Resources 30

Day 29: Ethernet and Media Access Control 31

CCENT 100-101 ICND1 Exam Topics 31

Key Topics 31

Ethernet Overview 31

Legacy Ethernet Technologies 32

CSMA/CD 33

Legacy Ethernet Summary 34

Current Ethernet Technologies 34

UTP Cabling 34

Benefits of Using Switches 36

Ethernet Addressing 36

Ethernet Framing 37

The Role of the Physical Layer 38

Study Resources 39

Day 28: Switching Concepts and Operation 41

CCENT 100-101 ICND1 Exam Topics 41

Key Topics 41

Evolution to Switching 41

Switching Logic 42

Collision and Broadcast Domains 43

Frame Forwarding 43

witch Forwarding Methods 44

Symmetric and Asymmetric Switching 44

Memory Buffering 44

Layer 2 and Layer 3 Switching 44

Accessing and Navigating the Cisco IOS 45

Connecting to Cisco Devices 45

CLI EXEC Sessions 46

Using the Help Facility 46

CLI Navigation and Editing Shortcuts 47

Command History 48

IOS Examination Commands 48

Subconfiguration Modes 49

Storing and Erasing Configuration Files 49

Study Resources 51

Day 27: Basic Switch Configuration 53

CCENT 100-101 ICND1 Exam Topics 53

Key Topics 53

Basic Switch Configuration Commands 53

Half-Duplex, Full-Duplex, and Port Speed 55

Automatic Medium-Dependent Interface Crossover (auto-MDIX) 56

Configuring SSH Ac...