This study guide is intended to provide those pursuing the CCNA certification with a framework of what concepts need to be studied. This is not a comprehensive document containing all the secrets of the CCNA, nor is it a “braindump” of questions and answers.
I sincerely hope that this document provides some assistance and clarity in your studies.
1. How Neighbor Table is created ?
S1
S0
KOL
E0 - 192.168.4.0
S1
S0
HYD
S0
S1
10.0.0.0
E0
E0 - 192.168.1.0
1.150
S0
CHE
S1
BAN
11.0.0.0
E0
E0 - 192.168.2.0
2.150
E0
E0 - 192.168.3.0
3.150
Neighbor ID
Int
Neighbor ID
Int
Neighbor ID
Int
192.168.2.150
S0
192.168.1.150
S1
192.168.2.150
S1
192.168.4.150
S1
192.168.3.150
S0
192.168.4.150
S0
LAN - 192.168.1.0/24
LAN - 192.168.2.0/24
LAN - 192.168.3.0/24
1
2. How Topology Table is created ?
S1
S0
KOL
E0 - 192.168.4.0
S1
S0
HYD
S0
S1
10.0.0.0
S0
CHE
S1
BAN
11.0.0.0
E0
E0 - 192.168.1.0
1.150
E0
E0 - 192.168.2.0
2.150
E0
E0 - 192.168.3.0
3.150
Link ID
Link ID
Link ID
192.168.4.150
192.168.4.150
192.168.1.150
192.168.1.150
192.168.1.150
192.168.3.150
192.168.2.150
192.168.2.150
192.168.2.150
192.168.3.150
192.168.3.150
192.168.4.150
LAN - 192.168.1.0/24
LAN - 192.168.2.0/24
LAN - 192.168.3.0/24
2
3. How Routing Information
Table is created ?
S1
Cost = 10
S0
Cost = 15
KOL
E0 - 192.168.4.0
S1
S0
HYD
Cost = 10
S1
10.0.0.0
S0
CHE
S0
Cost = 10
S1
BAN
11.0.0.0
E0
E0 - 192.168.1.0
1.150
E0
E0 - 192.168.2.0
2.150
E0
E0 - 192.168.3.0
3.150
Best path
Best path
Best path
192.168.2.0 = H C
192.168.1.0 = C H
192.168.1.0 = B C H
192.168.3.0 = H C B
192.168.3.0 = C B
192.168.2.0 = B C
192.168.4.0 = H K
192.168.4.0 = C H K
192.168.4.0 = B K
LAN - 192.168.1.0/24
LAN - 192.168.2.0/24
LAN - 192.168.3.0/24
3
4. If, Link goes down ?
S1
S0
KOL
E0 - 192.168.4.0
S1
S0
HYD
E0
1.150
S0
S1
10.0.0.0
LAN - 192.168.1.0/24
S0
CHE
E0
2.150
S1
BAN
11.0.0.0
LAN - 192.168.2.0/24
E0
3.150
LAN - 192.168.3.0/24
4
5. Effect on Neighbor Table ?
S1
S0
KOL
E0 - 192.168.4.0
S1
S0
HYD
S0
S1
10.0.0.0
E0
E0 - 192.168.1.0
1.150
S0
CHE
S1
BAN
11.0.0.0
E0
E0 - 192.168.2.0
2.150
E0
E0 - 192.168.3.0
3.150
Neighbor ID
Int
Neighbor ID
Int
Neighbor ID
Int
192.168.2.150
S0
192.168.1.150
S1
192.168.2.150
S1
192.168.4.150
S1
192.168.3.150
S0
192.168.4.150
S0
LAN - 192.168.1.0/24
LAN - 192.168.2.0/24
LAN - 192.168.3.0/24
5
6. Effect on Topology Table ?
S1
S0
KOL
E0 - 192.168.4.0
S1
S0
HYD
S0
S1
10.0.0.0
S0
CHE
S1
BAN
11.0.0.0
E0
E0 - 192.168.1.0
1.150
E0
E0 - 192.168.2.0
2.150
E0
E0 - 192.168.3.0
3.150
Link ID
Link ID
Link ID
192.168.4.150
192.168.4.150
192.168.4.150
192.168.1.150
192.168.1.150
192.168.3.150
192.168.2.150
192.168.2.150
192.168.2.150
192.168.3.150
192.168.3.150
192.168.1.150
LAN - 192.168.1.0/24
LAN - 192.168.2.0/24
LAN - 192.168.3.0/24
6
7. Effect on Routing Information
Table ?
S1
Cost = 10
S0
Cost = 15
KOL
E0 - 192.168.4.0
S1
S0
HYD
Cost = 10
S1
10.0.0.0
S0
CHE
S0
Cost = 10
S1
BAN
11.0.0.0
E0
E0 - 192.168.1.0
1.150
E0
E0 - 192.168.2.0
2.150
E0
E0 - 192.168.3.0
3.150
Best path
Best path
Best path
192.168.2.0 = H C
192.168.1.0 = C H
192.168.1.0 = B C H
192.168.1.0 = B C H
192.168.3.0 = H C B
192.168.3.0 = C B
192.168.2.0 = B C
192.168.4.0 = H K
192.168.4.0 = C H K
192.168.4.0 = B K
LAN - 192.168.1.0/24
LAN - 192.168.2.0/24
LAN - 192.168.3.0/24
7
8. Effect on Routing Information
Table ?
S1
Cost = 10
S0
Cost = 15
KOL
E0 - 192.168.4.0
S1
S0
HYD
Cost = 10
S1
10.0.0.0
S0
CHE
S0
Cost = 10
S1
BAN
11.0.0.0
E0
E0 - 192.168.1.0
1.150
E0
E0 - 192.168.2.0
2.150
E0
E0 - 192.168.3.0
3.150
Best path
Best path
Best path
192.168.2.0 = HKBC
192.168.1.0 = CBKH
192.168.1.0 = B K H
192.168.3.0 = H K B
192.168.3.0 = C B
192.168.2.0 = B C
192.168.4.0 = H K
192.168.4.0 = C B K
192.168.4.0 = B K
LAN - 192.168.1.0/24
LAN - 192.168.2.0/24
LAN - 192.168.3.0/24
8