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Lesson 14. Token Ring. Objectives. At the end of this Presentation, you will be able to:. Compare and contrast the characteristics of Token Ring and Ethernet. Describe the topology and the equipment used to implement Token Ring.

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Presentation Transcript

Objectives

Objectives

At the end of this Presentation, you will be able to:


Compare and contrast the characteristics of Token Ring and Ethernet.

Describe the topology and the equipment used to implement Token Ring.

Given simple diagrams of Token Ring and Ethernet networks, differentiate between them.

Describe “token passing” and explain its characteristics.


Network domains covered

Network+ Domains covered: Ethernet.

1.1

1.2

1.4



Token ring

Token Ring Ethernet.


Token ring1

Token Ring Ethernet.

Developed by IBM

Uses Token Passing to control network traffic

More expensive than Ethernet

Less popular than Ethernet


Token ring ethernet

Token Ring Ethernet Ethernet.

  • 10 Megabits/Second

  • 100 Megabits/Second

  • Wastes part of its bandwidth

4 Megabits/Second

16 Megabits/Second

Uses its full Bandwidth



Standards

Standards Ethernet.

IEEE 802.3 defines CSMA/CD (Ethernet)

IEEE 802.5 defines Token Ring




The multi station access unit mau

The Multi-station Access Unit (MAU) Ethernet.

Multi-station Access Unit (MAU)

1

2

3

4

5

6

7

8

Ring

IN

Ring

OUT



The multi station access unit mau1

The Multi-station Access Unit (MAU) Ethernet.

Multi-station Access Unit (MAU)

Ring

IN

Ring

OUT

1

2

3

4

5

6

7

8


Ring in and ring out jacks

Ring In and Ring Out Jacks Ethernet.

Multi-station Access Unit (MAU)

1

2

3

4

5

6

7

8

RI

RO


Multi-station Access Unit (MAU) Ethernet.

1

2

3

4

5

6

7

8

RI

RO

Multi-station Access Unit (MAU)

R/I

1

2

3

4

5

6

7

8

R/O


MAU Ethernet.

MAU

1

2

3

4

5

6

7

8

RI

RO

Ring

IN

Ring

OUT

1

2

3

4

5

6

7

8

RI

RO


Logical Ring Ethernet.


Server Ethernet.

MAU

1

2

3

4

5

6

7

8

Ring

IN

Ring

OUT

MAU

1

2

3

4

5

6

7

8

Ring

IN

Ring

OUT


Multi-station Access Unit (MAU) Ethernet.

Ring

IN

Ring

OUT

1

2

3

4

5

6

7

8

Multi-station Access Unit (MAU)

Ring

IN

Ring

OUT

1

2

3

4

5

6

7

8


Token ring nics and connectors

Token Ring NICs and Connectors Ethernet.

DB-9

RJ-45


Token passing protocol

Token Passing Protocol Ethernet.

1

Token

2

6

5

3

4


1 Ethernet.

Token

(Free)

2

6

5

3

4


1 Ethernet.

2

6

Token

(Free)

5

3

4


1 Ethernet.

2

6

5

3

4

Token

(Free)


1 Ethernet.

2

6

5

3

Packet

Token

(Busy)

4


1 Ethernet.

2

6

Token

(Busy)

Packet

5

3

4


1 Ethernet.

2

6

Token

(Busy)

Packet

5

3

4


1 Ethernet.

2

6

Packet

5

3

Token

(Busy)

4


1 Ethernet.

2

6

5

3

Token

(Free)

4


Token ring priority

Token Ring Priority Ethernet.

Non-priority Access control

Priority Access control


1 Ethernet.

2

6

Token

(Busy)

Packet

5

3

4


1 Ethernet.

2

6

5

3

Token

(Free)

4


Token ring speeds

Token Ring Speeds Ethernet.

4-Mbps and 16-Mbps

NIC must match the speed of the ring

A common mistake is to use a slow NIC in a fast token ring environment.

Can be slowed by transferring very large files.

A sudden slow down immediately after changing an NIC.


Token ring2

Token Ring Ethernet.

Logical ring, physical star topology

Defined by IEEE 802.5 standard

4 Megabit and 16 Megabit

Uses it bandwidth more efficiently than Ethernet.

Uses token passing to control media access


Compare and contrast the characteristics of Token Ring and Ethernet.

Describe the topology and the equipment used to implement Token Ring.

Given simple diagrams of Token Ring and Ethernet networks, differentiate between them.

Describe “token passing” and explain its characteristics.


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