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CCNA

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Example of a Routed Protocol?
A link is an interface on a router
IP
A permit statement
Checks the source and destination address then permits or denies specific protocols

2. The advantages of VLSM
Maximizing address efficiency - organization - summarization
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
It is never useful to send information about a route back in the direction from which the original info came.
Susceptible to routing loops

3. In Link state terminology - What is a link?
A link is an interface on a router
Inter-VLAN routing
...
Scalable and fast convergence

4. Spanning-Tree coast of 4
Telnet connectivity - authentication and extended ACLs
Reduce the link-state database and routing table
1Gb/s
4 times the hello interval

5. In Link state terminology - What is a link?

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6. In regards to ACL's What are the three protocols?
One ACL per protocol - One ACL per direction - Once ACL per interface
1
Maximizing address efficiency - organization - summarization
Every 10 seconds

7. Who designed OSPF?
20 seconds: 10 missed BPDU's
16
Updates all DROTHER Routers when a change occurs
IETF

8. What three types of IPv6 address types are there?
IETF
No
Anycast
Unicast - Multicast - Anycast

9. When do you use Access-Class
For line vty 0 4
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
The Diffusing Update Algorithm (DUAL)
Checks the source address and then permits or denies the entire protocol suite

10. Can a Router exchange routing information if they are using different Routing Protocols?
No
Bandwidth & Delay
Packets are processed before they are routed to an outbound interface.
IETF

11. OSPF routes packets within a single?
Autonomous System
Multiple virtual interfaces that are associated with one physical interface
100Mb/s
TRUE

12. What does the back bone router do?
Connects the different areas
Layers 1 & 2
1Gb/s
Area Border Router

13. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Test Firsts/ Routes Second
Supports both unequal metric load balancing and equal metric balancing.
R= Rip protocol; You can reach network 192.168.1.0 in two hops. The 120 is the admin distance and the 2 is the metric (hop). and it can be reached via the 10.1.1.2 network.
Autonomous System

14. What type of authentication does EIGRP use?
To select the best path to the destination
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
MD5 and you have to enable it if you want to use it.
Packet Header

15. Classful Protocols summarize
2^n-2
Bandwidth & Delay
A link is an interface on a router
Automatically

16. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
Every 30 minutes by default
TRUE
30-50 seconds
Designated Router (DR) and a Back-up designated Router (BDR)

17. Problem with RIP
IETF
4
A backbone area...Also known as Area 0
Susceptible to routing loops

18. How long is the dead interval
Connects the different areas
Multicast
4 times the hello interval
100Mb/s

19. What is one to many?
Multicast
By DLCI's
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
EIGRP - OSPF - RIP

20. The time delay for a router to match a network change?
Make sure you are in interface mode - then use this command ip access-group 1 out/in
224.0.0.5
Convergence
Port based

21. Formula for determining hosts
Autonomous System
2^n-2
Packets are processed before they are routed to an outbound interface.
Aka Subnet mask

22. In frame relay What is Inverse Arp
The lower MAC address
Associating the network address with a local DLCI.
Determines the cost which is the bandwidth
Propagation of partial updates that are sent only to those routers that the changes affect.

23. Explain how routing loops occur with RIP?
Aka Subnet mask
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
DROTHER
...

24. Advance Distance Vector or Hybrid uses what?
224.0.0.10
A combination of Link-state and distance vector
1.) Enter the Routing Manually 2.) Use Dymamic Routing
RIPv2 & EIGRP

25. What are two statements that are true of IPv6 address representation?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Data Link Connection Identifier
Distance Vector
32768

26. Benefits of OSPF?
Unicast - Multicast - Anycast
Distance Vector
Scalable and fast convergence
Null

27. OSPF will elect a what?
Every 30 minutes by default
The information regarding that link. This can include the router's IP address - the type of network - the cost of the link - and if there are any neighboring routers on that link.
Designated Router (DR) and a Back-up designated Router (BDR)
A combination of Link-state and distance vector

28. What do area's do?
Unicast - Multicast - Anycast
Area Border Router
Select the routing protocol - then specify the network.
Reduce the link-state database and routing table

29. Can you delete individual entries in a specific ACL?
View
90
Advance Distance Vector
Only with Cisco IOS software release 12.3 (2) T

30. What is an ABR
TRUE
Dijkstra's Algorithm
Area Border Router
The lower MAC address

31. What is a VLAN
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
A group of end stations with a common set of requirements - independent of their physical location
Individual or group IP's
Port based

32. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
The information regarding that link. This can include the router's IP address - the type of network - the cost of the link - and if there are any neighboring routers on that link.
Connects the different areas
View
20 seconds: 10 missed BPDU's

33. Summarization of network information usually occurs where?
Multicast
20 seconds: 10 missed BPDU's
Between areas?
RIPv2 & EIGRP

34. What is the default for equal cost paths for load balancing with OSPF?
Propagation of partial updates that are sent only to those routers that the changes affect.
20 seconds: 10 missed BPDU's
4
Domain

35. Why is it important to have a loopback address when using OSPF?
A layer 3 switch or router
The Diffusing Update Algorithm (DUAL)
Adjacency
Because a loopback interface is always active and cannot be in a down state like a real interface can.

36. Exterior Gateway Protocols are designed for use between
10Mb/s
Convergence
MD5 and you have to enable it if you want to use it.
Different Autonomous Systems

37. What are subinterfaces?
Multiple virtual interfaces that are associated with one physical interface
TRUE
RIPv2 and EIGRP
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available

38. What does bounded refer to?
Distance Vector
Match on all routers or it will not work
Propagation of partial updates that are sent only to those routers that the changes affect.
Bandwidth & Delay

39. What is the purpose of LMI
Layers 1 & 2
It is the signaling standard that maintains connection and statues between the DCE and DTE
Every 30 minutes by default
TRUE

40. How does the SPF determine the shortest path?
Ever 2 seconds
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Determines the cost which is the bandwidth

41. Describe features of RIPv1
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
A group of end stations with a common set of requirements - independent of their physical location
To select the best path to the destination
Area Border Router

42. Spanning-Tree cost of 100
The update only includes info about the route change
10Mb/s
32768
2^n

43. What are non designated routers called?
DROTHER
Domain
IETF
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.

44. Explain OSPF

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45. How often does a router send link-state advertisements?
A combination of Link-state and distance vector
Maximizing address efficiency - organization - summarization
Every 30 minutes by default
MD5 and you have to enable it if you want to use it.

46. What two parameters does EIGRP use to determine the best route?
20 seconds: 10 missed BPDU's
Advertised Distance & Feasible distance
Advance Distance Vector
Propagation of partial updates that are sent only to those routers that the changes affect.

47. Routers are used for what?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
To select the best path to the destination
Plaintext and MD5
Autonomous System

48. With OSPF - there must always be a area......
Dijkstra's Algorithm
0
...
Adjacency

49. What is the spilt horizon rule?
It is never useful to send information about a route back in the direction from which the original info came.
A layer 3 switch or router
Make sure you are in interface mode - then use this command ip access-group 1 out/in
RIPv2 & EIGRP

50. Max_age time for BPDU's

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