© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-1
!"loring the #$nctions o% Net&or'ing
 
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-2
What Is a Network?
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-(
Physical Topology Categories
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-)
Full-Mesh Topology
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-
Partial-Mesh Topology
 
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-/
Understanding Host-to-Host Counications
lder model
  ro"riet+ry
  A""lic+tion +nd comin+tions so%t&+re controlled y one vendor 
St+nd+rds-+sed model
  3$ltivendor so%t&+re
  4+yered +""ro+ch
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-7
Why a !ayered Network Model?
5ed$ces com"le!ity
ns$res intero"er+le technology
 
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-
"ata #ncapsulation
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-8
"ata "e-#ncapsulation
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-10
Peer-to-Peer Counication
© 2007 Cisco Systems, Inc. All rights reserved. ICND1 v1.0—1-11
TCP$IP %tack &s' the (%I Model