Know Your Network

>10 000 Notebooks

>2,000 PCs & Workstations

Acad. Staff PCs

Notebook Users

Dept LANs

Wireless Virtual LAN

>4,500 PCs & Workstations

Student PC Clusters

Acad. Virtual LAN

3,000 Points

230 Points

6x Halls of Residence

Libraries

Lab PCs

Faculties, LTs, Seminar Rooms, Common Areas

NUS Secure Plug-n-Play Virtual Lan (Supports Video

Student Virtual LAN

500 Points

Streaming to every port) Origin 2000

CRA Y J90 Supercomputers

Admin Staff PCs 500 PCs Admin. Virtual LAN

NUSNET Backbone Gigabit Ethernet (24 Gbps)

2,800 Points

Canteens & YIH

Authentication Firewalls

155 Mbps

Internet (Supports Video Streaming to Firewalls Admin. every port) Firewalls

Web Server Farm

GE

Seattle (Internet/ Internet 2 Connections)

Thru: Starhub

Admin database Servers Intranet Servers

Digital Library

Net TV

Internet

NUSNET Topology Core 24 Gbps

(1st Tier)

(Aggregate GE Bandwidth)

2 Gbps (GE)

Distribution (2nd Tier)

Edge (3rd Tier)

1 Gbps (GE)

15 GE Switches

646 (48-port 10/100Mbps) Ethernet Switches 10/100 Mbps for every user

CS3103 Computer Networks & Protocols

Know Your Networks - 1

Residential access: cable modems

Diagram: http://www.cabledatacomnews.com/cmic/diagram.html Source: Computer Networking – Jim Kurose, 3rd Edition

CS3103 Computer Networks & Protocols

Know Your Networks - 2

Cable Network Architecture: Overview

Typically 500 to 5,000 homes

cable headend cable distribution network (simplified)

home

Source: Computer Networking – Jim Kurose, 3rd Edition

Cable Network Architecture: Overview

cable headend cable distribution network (simplified)

home

Source: Computer Networking – Jim Kurose, 3rd Edition

CS3103 Computer Networks & Protocols

Know Your Networks - 3

Cable Network Architecture: Overview server(s)

cable headend cable distribution network

home

Source: Computer Networking – Jim Kurose, 3rd Edition

Cable Network Architecture: Overview FDM: V I D E O

V I D E O

V I D E O

V I D E O

V I D E O

V I D E O

D A T A

D A T A

C O N T R O L

1

2

3

4

5

6

7

8

9

Channels

cable headend cable distribution network

home

Source: Computer Networking – Jim Kurose, 3rd Edition

CS3103 Computer Networks & Protocols

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Company access: local area networks • company/univ local area network (LAN) connects end system to edge router • Ethernet: – shared or dedicated link connects end system and router – 10 Mbs, 100Mbps, Gigabit Ethernet • LANs: chapter 5 Source: Computer Networking – Jim Kurose, 3rd Edition

Wireless access networks • shared wireless access network connects end system to router – via base station aka “access point”

router base station

• wireless LANs: – 802.11b (WiFi): 11 Mbps

• wider-area wireless access – provided by telco operator – 3G ~ 384 kbps • Will it happen?? – WAP/GPRS in Europe

CS3103 Computer Networks & Protocols

mobile hosts

Source: Computer Networking – Jim Kurose, 3rd Edition

Know Your Networks - 5

Home networks Typical home network components: • ADSL or cable modem • router/firewall/NAT • Ethernet • wireless access point to/from cable headend

cable modem

router/ firewall Ethernet

wireless laptops wireless access point

Source: Computer Networking – Jim Kurose, 3rd Edition

• Internet has proliferated rapidly

Date 12/69 12/79 01/89 07/95 07/95 07/96 07/97 07/98 07/99 07/00

Hosts 4 188 80,000 6,642,000 8,200,000 16,729,000 26,053,000 36,739,000 56,218,000 80,000,000

(projection)

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WWW Growth: Date ----06/93 09/93 10/93 12/93 06/94 12/94 06/95 01/96 06/96 07/96 08/96 09/96 10/96 11/96 12/96 01/97 02/97 03/97

Sites ---------130 204 228 623 2,738 10,022 23,500 100,000 252,000 299,403 342,081 397,281 462,047 525,906 603,367 646,162 739,688 883,149

| + | | | | | | | | | | | | | | | | | |

Date ----04/97 05/97 06/97 07/97 08/97 09/97 10/97 11/97 12/97 01/98 02/98 03/98 04/98 05/98 06/98 07/98 08/98 09/98

Sites ---------1,002,512 1,044,163 1,117,255 1,203,096 1,269,800 1,364,714 1,466,906 1,553,998 1,681,868 1,834,710 1,920,933 2,084,473 2,215,195 2,308,502 2,410,067 2,594,622 2,807,588 3,156,324

| + | | | | | | | | | | | | | | | | | | | | |

Date ----10/98 11/98 12/98 01/99 02/99 03/99 04/99 05/99 06/99 07/99 08/99 09/99 10/99 11/99 12/99 01/00 02/00 03/00 04/00 05/00 06/00

Sites ---------3,358,969 3,518,158 3,689,227 4,062,280 4,301,512 4,389,131 5,040,663 5,414,325 6,177,453 6,598,697 7,078,194 7,370,929 8,115,828 8,844,573 9,560,866 9,950,491 11,161,811 13,106,190 14,322,950 15,049,382 17,119,262

Sites = # of web servers (one host may have multiple sites by using different domains or port numbers)

Please refer to the website in the slide (Hobbes’ Internet Timeline for Latest stastics

CS3103 Computer Networks & Protocols

Know Your Networks - 7

Network Evolution : Spiral

Commodity (Commercialization)

Privatization (+ Partners) Commercial ISP’s

Academic [ANSnet] Networks

[ARPAnet] Testbeds

[NSFnet]

Gigabit Testbeds

,

Internet3

CANET II

I2, SingAREN, APAN]

[vBNS, Abilene]

R&D/Experimental Source: Prof Goto, www.apan.net

R&D/Production (+ Partners)

Traffic Characteristics: Research networks vs. Commodity Internet Other Multicast SMTP DNS shell/cmd ssh NNTP Games FTP Web

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Internet2 Mission Facilitate and coordinate the development, deployment, operation and technology transfer of advanced, network-based applications and network services to further research and higher education and accelerate the availability of new services and applications on the Internet.

Internet2 Member Universities 132 Members as of October 1998

Hawaii

CS3103 Computer Networks & Protocols

http://www.internet2.edu

Know Your Networks - 9

Abilene Network 1999 Seattle

Eugene

Westfield

Minneapolis

New York Cleveland

Salt Lake City Pittsburgh Lincoln

Sacramento Oakland

Indianapolis

New Haven

Newar Trent k on Philadelp Wilmington hia

Detroit

Columbus Washington

Denver Kansas City Raleigh Albuquerque Oklahoma City

Los Angeles

Nashville

Atlanta Anaheim

Phoenix Dallas

Abilene Router Node

Access Node

New Orleans

Planned 1999

Houston Peering Point - NGIX Miami

33 Total Access Points

Optical Internet Architecture Both sides of 4/BLSR 1:1 span ring used for IP traffic Traditional SONET Gear

SONET

OADM

OADM

SONET

3 0C-48 Tx 1 OC-48 Rx

Asymmetric Tx/Rx lambdas that can be dynamically altered

Traditional SONET Restoral

CS3103 Computer Networks & Protocols

Low priority traffic that can be buffered or have packet loss in case of fiber cut

High Priority Traffic Cannot exceed 50% of bandwidth in case of fiber cut

Know Your Networks - 10

.. Future look Courtesy: Dr. Vint Cerf

Space: the final frontier

Our 25 year mission: to go where no network has gone before!

Courtesy: Dr. Vint Cerf

CS3103 Computer Networks & Protocols

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Courtesy: Dr. Vint Cerf

Courtesy: Dr. Vint Cerf

CS3103 Computer Networks & Protocols

Know Your Networks - 12

•End-to-end information flow across the solar system •Layered architecture for evolvability and interoperability •IP-like protocol suite tailored to operate over long round trip light times •Integrated communications and navigation services

Courtesy: Dr. Vint Cerf

Interplanetary Internet Status • Part of the Mars Mission Plan • Possible Earth/Moon mission 2001 • Low Mars Orbit and Areosynchronous satellites by 2008 • Mars Outposts by 2010 • Possible Orbiting manned mission 2018 • Possible Manned Mars station 2030?? • Stable Interplanetary backbone 2040? Courtesy: Dr. Vint Cerf

CS3103 Computer Networks & Protocols

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KEY MESSAGE As with many new developments, the most significant results and applications of the Next Generation Internet have not even been thought of yet," said George Strawn, division director for NSF's Division of Advanced Networking Infrastructure and Research. "The best is yet to come."

CS3103 Computer Networks & Protocols

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