CCNA video links

Network Topologies : http://www.youtube.com/watch?v=huTEGKEVIWY

OSI Model : http://www.youtube.com/watch?v=sVDwG2RdJho

Collision Domain Broadcast Domain : http://www.youtube.com/watch?v=Xou_IM_PF0w

Switch, Router, Hub : http://www.youtube.com/watch?v=reXS_e3fTAk

ARP : http://www.youtube.com/watch?v=1jncvd6JDoc

IPv4 Address : http://www.youtube.com/watch?v=FqmtvA1R8A8

Classless Interdomain Routing (CIDR) : http://www.youtube.com/watch?v=Q1U9wVXRuHA

Solve a VLSM subnet problem - Cisco CCNA : http://www.youtube.com/watch?v=Difion6P1h0

How switch learns mac-address : http://www.youtube.com/watch?v=WqjpBn-0oI4

Switch - Animate switching, flooding, MAC table : http://www.youtube.com/watch?v=L1nLa_tbqoA

How to switch broadcasting packets : http://www.youtube.com/watch?v=k61mg6D5Kuo

Switch Port Security : http://www.youtube.com/watch?v=AUIcsXqNvJ4

VLAN & VTP : http://www.youtube.com/watch?v=Z8s_sxzw3zI

DTP : http://www.youtube.com/watch?v=ZMuvCIE5Wms&list=PLB6CB791010430835&index=20

Inter VLAN Routing : http://www.youtube.com/watch?v=xZutLyb3rtc

STP : http://www.youtube.com/watch?v=6AxDqaG9M7

Etherchannel : http://www.youtube.com/watch?v=lZZ5mYNgvYI

CDP : http://www.youtube.com/watch?v=udRAoNtLawI&list=PL045B070715AA1FE9&index=7

telnet : http://www.youtube.com/watch?v=1aBAAo0FC20

Default Route : http://www.youtube.com/watch?v=d4TaWothbLA

Static Route : http://www.youtube.com/watch?v=Ba2MGQR8nXY

Routing Protocols Overview Part1 : http://www.youtube.com/watch?v=CBDdM-imW7o

Routing Protocols Overview Part 2  : http://www.youtube.com/watch?v=TgpjL6_W9M0

EIGRP : http://www.youtube.com/watch?v=rG8Qgp4bEKc

OSPF : http://www.youtube.com/watch?v=aViWX9I4BK8

ACL  : http://www.youtube.com/watch?v=hdIsKTKeQt4

NAT : http://www.youtube.com/watch?v=xkCgYaJXDSk

FHRP :  http://www.youtube.com/watch?v=oGIOoy6-BFw

Frame Relay - Topologies and Designs - Part 1 : http://www.youtube.com/watch?v=xQa6nqhwqGk

WAN Protocols and Connection Technologies : http://www.youtube.com/watch?v=AoGqbQXRBAo

Frame Relay : http://www.youtube.com/watch?v=vABIIJJftao

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CCNA IP Addressing Answers

1. Static address (Assigned by an administrator), Dynamic address (assigned by DHCP/BOOTP Server) & Link local address (APIPA) 
2.  Initially IANA (Internet Assigned Numbers Authority) replaced by ICANN (Internet Corporation for Assigned Names and Numbers), in the year 1998.
3. IP address - RFC1166; CIDR - RFC4632; Supernetting - RFC1338 
4. D – 255.255.255.252 
5. 10.0.0.0/8, 172.16.0.0/16 to 172.31.0.0/16, 192.168.0.0/24 to 192.168.255.0/24 
6. 1022 
7. DAD (Duplicate Address Detection) 
8. Prefix = Number of net bits , Suffix-Number of host bits  
9. Automatic private IP addressing (APIPA) is a feature mainly found in Microsoft operating systems. APIPA enables clients to still communicate with other computers on the same network segment until an IP address can be obtained from a DHCP server, allowing the machine to fully participate in the network. The range of these IP address is 169.254.0.1 to 169.254.255.254 with a default Class B subnet mask of 255.255.0.0. Optimal use of IP addresses based on number of hosts in a network thereby reducing IP wastage.
10. Optimal use of IP addresses based on number of hosts in a network thereby reducing IP wastage.
11. Reduces the size of the routing table (By combining the contiguous networks), Provides IP address blocks as per customer requirements. (VLSM)
12. 2^17
13. 172.16.32.191
14. 62
15.  172.16.16.1 through 172.16.19.254
16. 172.27.16.64
17. Broadcast Address: 10.28.127.255 and Subnet ID: 10.28.64.0
18. SNM: 255.255.252.0 and Last Subnet Address: 172.16.252.0
19. It will not allow the use of 1st subnet address.
20. 172.27.220.1 through 172.27.21.254
21. 172.31.9.127
22. 172.22.95.128
23. 172.23.55.129 through 172.23.55.190
24. 10.95.64.1, 10.95.127.254 and 10.95.127.255
25. 172.30.183.255
26. 192.168.28.128
27. 192.168.238.94
28. 172.18.115.255
29. 172.19.124.1 through 172.19.127.254
30. 172.24.192.0
31. 172.20.212.0
32. 192.122.63.17 through 192.122.63.30
33. 192.19.191.225 through to 192.19.191.254
34. 171.23.15.255
35. 172.21.94.1 through 172.21.95.254
36. 4096 subnets and 4094 hosts
37. 172.28.3.254
38. 8 subnets and 30 hosts
39. 172.229.128.1 through 172.229.143.254
40. 194.166.72.223

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CCNA IP Addressing Questions

1. What are the various ways of assigning an IP address to a network host?

2. Which organization was initially responsible for allocating public IP addresses 

& which organization replaced it?

3. In which RFCs have IP address, CIDR & Supernetting been described officially?

4. Which of the following subnet mask would be right for a point to point link?

A 255.255.255.253

B 255.255.255.0

C 255.255.255.128

D 255.255.255.252

E 255.255.252.0

5. Which blocks of the IP addresses have been reserved for private use?

6. How many hosts are supported in a network with prefix /22?

7. Which protocol helps avoid duplicate IP address assignment in a network?

8. What do you mean by prefix and suffix in an IP address? 

9. What is APIPA? 

10. What's the benefit of subletting?

11. What are the benefits of CIDR implementation?

12. What is the block size of the subnet with a mask 255.254.0.0?

13. What is the broadcast address of the network 172.16.32.128/26?

14. How many host addresses are available in the network 192.168.139.0/26?

15. What is the range of valid host addresses in the sub network 172.16.16.0/22?

16. Which subnet does host 172.27.116.111 255.255.255.192 belong to?

17. Determine the subnet ID & the broadcast address to which the IP address 10.28.64.2/18 belongs to.

18. A Network administrator has to divide 172.16.0.0/16 into minimum of 128 subnets with at least 1000 hosts/subnet. What would be the subnet mask of the subnets and the last sub network address after dividing the above network address?

19. What will happen if "IP SUBNET-ZERO" is not configured in a router?

20. What valid host range is the IP address 172.27.220.40 255.255.254.0 part of? (Clue: subnet range)

21. What is the broadcast address of the network 172.31.9.0/25?

22. Which subnet does host 172.22.95.149 255.255.255.192 belong to?

23. What valid host range is the IP address 172.23.55.155/26 part of?

24. What is the first valid host, last valid host and broadcast address of the subnet to which the host 10.95.78.139/20 belongs to?

25. What is the broadcast address of the network 172.30.180.0/22?

26. Which subnet does host 192.168.28.132 255.255.255.192 belong to?

27. What is the last valid host on the subnet 192.168.238.80/28?

28. What is the broadcast address of the network 172.18.112.0 255.255.252.0?

29. What valid host range is the IP address 172.19.126.127 255.255.252.0 a part of?

30. Which subnet does host 172.24.193.223 255.255.248.0 belong to?

31. Which subnet does host 172.20.213.190/22 belong to?

32. What valid host range is the IP address 192.122.63.27/28 a part of?

33. What valid host range is the IP address 192.19.191.203/27 a part of?

34. What is the broadcast address of the network 171.23.0.0 255.255.240.0?

35. What valid host range is the IP address 172.21.95.255/23 a part of?

36. How many subnets and hosts per subnet are possible with the network 10.0.0.0/20?

37. What is the last valid host on the subnet 172.28.0.0 255.255.252.0?

38. How many subnets and hosts per subnet can you get from the network 192.166.95.0/27?

39. What valid host range is the IP address 172.229.133.119 255.255.240.0 a part of?

40. What is the broadcast address of the network 194.166.72.192 255.255.255.224?

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