Test your basic knowledge |

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. How long is the dead interval
110
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Susceptible to routing loops
4 times the hello interval

2. In regards to troubleshooting OSPF what should you check?
...
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Designated Router (DR) and a Back-up designated Router (BDR)
Plaintext and MD5

3. How does an outbound ACL work?
Distance Vector
A permit statement
No
Routes First/ Tests second

4. With OSPF - what must be defined?
A backbone area...Also known as Area 0
Packet Header
2^n
110

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

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6. OSPF routes packets within a single?
The Diffusing Update Algorithm (DUAL)
Automatically
View
Autonomous System

7. What is the default Bridge priority?
Multicast
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
0
32768

8. Admin distance of RIPv2
4
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
120
Test Firsts/ Routes Second

9. What does bounded refer to?
Propagation of partial updates that are sent only to those routers that the changes affect.
0
RIPv2 and EIGRP
View

10. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
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.
Multicast
Multiple virtual interfaces that are associated with one physical interface

11. How does Link-State work?
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Select the routing protocol - then specify the network.
Each router builds a map of the network and determines the shortest path to every network.
The inverse of a subnet mask.

12. What are the three LMI standards
Determines the cost which is the bandwidth
Aka Subnet mask
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Cisco - ANSI - Q.933A

13. Admin distance of a connected Network?
The Root bridge is the bridge with the lowest bridge ID
Test Firsts/ Routes Second
Domain
0

14. What is the Wildcard mask
Forces protocols to behave as if they were classless
Routes First/ Tests second
The inverse of a subnet mask.
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

15. For an adjacency to occur what do the routers have to agree on?
Port based
One ACL per protocol - One ACL per direction - Once ACL per interface
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Routes First/ Tests second

16. What are two OSPF authentication methods?
Propagation of partial updates that are sent only to those routers that the changes affect.
Plaintext and MD5
The inverse of a subnet mask.
Determines the cost which is the bandwidth

17. What is the default for equal cost paths for load balancing with OSPF?
Convergence
4
Layers 1 & 2
Reduce the link-state database and routing table

18. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Advertised Distance & Feasible distance
The lower MAC address
Autonomous System

19. How does inbound ACL work?
100Mb/s
Test Firsts/ Routes Second
Each router builds a map of the network and determines the shortest path to every network.
Port based

20. What type of algorithm does RIP use?
It combines the advantages of Link-State and Distance vector routing protocols.
Distance Vector
Unspecified
Make sure you are in interface mode - then use this command ip access-group 1 out/in

21. When do you use Access-Class
The update only includes info about the route change
For line vty 0 4
The Diffusing Update Algorithm (DUAL)
1

22. Normal time for STP convergence
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
The inverse of a subnet mask.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
30-50 seconds

23. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
1
Every 10 seconds
Null
View

24. How often does a router send link-state advertisements?
224.0.0.10
Individual or group IP's
IP
Every 30 minutes by default

25. Max_age time for BPDU's

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26. Can a Router exchange routing information if they are using different Routing Protocols?
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.
No
Updates all DROTHER Routers when a change occurs
Telnet connectivity - authentication and extended ACLs

27. When placing ACL's in the Network...Do what?

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28. The no auto-summary command does what?
Forces protocols to behave as if they were classless
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Make sure you are in interface mode - then use this command ip access-group 1 out/in
By DLCI's

29. What is one to nearest
15.....16 hops and the interface is down
110
Checks the source address and then permits or denies the entire protocol suite
Anycast

30. Can you delete individual entries in a specific ACL?
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.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Only with Cisco IOS software release 12.3 (2) T
The Root bridge is the bridge with the lowest bridge ID

31. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
TRUE
Anycast
4 times the hello interval
Plaintext and MD5

32. With OSPF - there must always be a area......
0
Plaintext and MD5
Not scalable - hard to maintain as the network grows
TRUE

33. The advantages of VLSM
Reduce the link-state database and routing table
Telnet connectivity - authentication and extended ACLs
Maximizing address efficiency - organization - summarization
224.0.0.5

34. Spanning-Tree coast of 4
1Gb/s
4
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Between areas?

35. How does the SPF determine the shortest path?
Determines the cost which is the bandwidth
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Only with Cisco IOS software release 12.3 (2) T
A combination of Link-state and distance vector

36. What is needed to pass traffic from one VLAN to another?
Ever 2 seconds
Individual or group IP's
Inter-VLAN routing
A layer 3 switch or router

37. What is a VLAN
A group of end stations with a common set of requirements - independent of their physical location
A link is an interface on a router
Between areas?
Advertised Distance & Feasible distance

38. What is the default load balancing for RIP
4
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Updates all DROTHER Routers when a change occurs
For line vty 0 4

39. What is ::1
Connects the different areas
The lower MAC address
Loopback
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

40. How do you apply the ACL to an interface
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Individual or group IP's
Null
Data Link Connection Identifier

41. By default OSPF uses what type of authentication?
Select the routing protocol - then specify the network.
Null
224.0.0.10
Every 5 seconds

42. The AS number must what?
Match on all routers or it will not work
Packets are processed before they are routed to an outbound interface.
Checks the source address and then permits or denies the entire protocol suite
20 seconds: 10 missed BPDU's

43. What is the multicast address for EIGRP?
0
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
224.0.0.10

44. How does EIGRP work with regards to Load Balancing
A layer 3 switch or router
Supports both unequal metric load balancing and equal metric balancing.
Advertised Distance & Feasible distance
The Diffusing Update Algorithm (DUAL)

45. What is ::
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Unspecified
The inverse of a subnet mask.
Not scalable - hard to maintain as the network grows

46. What is the spilt horizon rule?
15.....16 hops and the interface is down
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Area Border Router
It is never useful to send information about a route back in the direction from which the original info came.

47. What does DLCI stand for?
A trunk
Data Link Connection Identifier
MAC based
Distance Vector

48. How does an Extended ACL work?
Checks the source and destination address then permits or denies specific protocols
Designated Router (DR) and a Back-up designated Router (BDR)
...
Reduce the link-state database and routing table

49. What type of authentication does EIGRP use?
MD5 and you have to enable it if you want to use it.
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Bandwidth & Delay

50. Nonbackbone - internal routers are aware of what topology
Determines the cost which is the bandwidth
Different Autonomous Systems
TRUE
Only topology within their respective area.