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 does Link-State work?
A backbone area...Also known as Area 0
Link-State
Packet Header
Each router builds a map of the network and determines the shortest path to every network.

2. Rip is capable of load balancing over as many as?
Six equal cost paths
Reduce the link-state database and routing table
Multiple virtual interfaces that are associated with one physical interface
View

3. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Port based
16
Area Border Router

4. What does EIGRP use to calculate it's metric?
...
Test Firsts/ Routes Second
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Bandwidth & Delay

5. What are the major components of OSPF troubleshooting?
120
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Only topology within their respective area.
Routes First/ Tests second

6. 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
To select the best path to the destination
Determines the cost which is the bandwidth
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available

7. Dynamic VLAN is what?
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.
Inter-VLAN routing
MD5 and you have to enable it if you want to use it.
MAC based

8. How does a Standard ACL work?
1Gb/s
Checks the source address and then permits or denies the entire protocol suite
Data Link Connection Identifier
Aka Subnet mask

9. Advance Distance Vector or Hybrid uses what?
Cisco - ANSI - Q.933A
1Gb/s
Checks the source and destination address then permits or denies specific protocols
A combination of Link-state and distance vector

10. How are Frame Relay Circuits identified?

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11. How many hops are allowed with RIP?
By DLCI's
110
15.....16 hops and the interface is down
10Mb/s

12. With OSPF - there must always be a area......
The lower MAC address
0
Area Border Router
4 times the hello interval

13. What type of algorithm does OSPF & IS-IS use?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
The Root bridge is the bridge with the lowest bridge ID
Link-State
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.

14. OSPF routes packets within a single?
Autonomous System
Telnet connectivity - authentication and extended ACLs
4
120

15. What three types of IPv6 address types are there?
Private: link local
Unicast - Multicast - Anycast
RIPv2 & EIGRP
Not scalable - hard to maintain as the network grows

16. What two parameters does EIGRP use to determine the best route?
Match on all routers or it will not work
For line vty 0 4
Advertised Distance & Feasible distance
Make sure you are in interface mode - then use this command ip access-group 1 out/in

17. Example of a Routed Protocol?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
RIPv2 & EIGRP
All backup routes for destinations.
IP

18. How does inbound ACL work?
TRUE
Test Firsts/ Routes Second
20 seconds: 10 missed BPDU's
224.0.0.10

19. Describe an Outbound ACL
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Unicast - Multicast - Anycast
Supports both unequal metric load balancing and equal metric balancing.
A backbone area...Also known as Area 0

20. What is a VLAN
224.0.0.5
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
A group of end stations with a common set of requirements - independent of their physical location
Dijkstra's Algorithm

21. What is the default for equal cost paths for load balancing with OSPF?
MAC based
4
By DLCI's
Ever 2 seconds

22. What are subinterfaces?
224.0.0.5
Multiple virtual interfaces that are associated with one physical interface
Private: link local
Routes First/ Tests second

23. Admin distance of EIGRP?
Maximizing address efficiency - organization - summarization
Susceptible to routing loops
90
Make sure trunking is established. Ensure that dot1q encapsulation is set - and then for each subinterface do this encapsulation dot1Q 2 where 2 is the VLAN associated with that interface

24. How often are BPDU's sent?
Ever 2 seconds
Layers 1 & 2
Propagation of partial updates that are sent only to those routers that the changes affect.
20 seconds: 10 missed BPDU's

25. Formula for determining hosts
Disable auto summarization
2^n-2
32768
...

26. How is the root bridge determined?
The Root bridge is the bridge with the lowest bridge ID
Associating the network address with a local DLCI.
Forces protocols to behave as if they were classless
120

27. What is ::
It is never useful to send information about a route back in the direction from which the original info came.
Unspecified
Checks the source and destination address then permits or denies specific protocols
A permit statement

28. Nonbackbone - internal routers are aware of what topology
One ACL per protocol - One ACL per direction - Once ACL per interface
30-50 seconds
Reduce the link-state database and routing table
Only topology within their respective area.

29. How does an outbound ACL work?
Null
TRUE
Routes First/ Tests second
MD5 and you have to enable it if you want to use it.

30. An OSPF neighbor relationship can also be called what?
A layer 3 switch or router
Adjacency
Disable auto summarization
15.....16 hops and the interface is down

31. What do area's do?
Maximizing address efficiency - organization - summarization
Domain
A protocol on how to communicate with other routers
Reduce the link-state database and routing table

32. A router running EIGRP will store what?
All backup routes for destinations.
Ever 2 seconds
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Only with Cisco IOS software release 12.3 (2) T

33. Classful Protocols summarize
Every 30 Seconds
For line vty 0 4
Automatically
224.0.0.10

34. How does EIGRP work with regards to Load Balancing
TRUE
Supports both unequal metric load balancing and equal metric balancing.
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Private: link local

35. How often are OSPF hello packets sent out?
Distance Vector
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.
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Every 10 seconds

36. When do you use Access-Class
20 seconds: 10 missed BPDU's
120
Connects the different areas
For line vty 0 4

37. Admin distance of a Static Route?
1
0
View
Automatically

38. Normal time for STP convergence
Test Firsts/ Routes Second
The Diffusing Update Algorithm (DUAL)
MD5 and you have to enable it if you want to use it.
30-50 seconds

39. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Multicast
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
View
A combination of Link-state and distance vector

40. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
224.0.0.5
The lower MAC address
The inverse of a subnet mask.
4

41. For an adjacency to occur what do the routers have to agree on?
Every 5 seconds
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Bandwidth & Delay
Propagation of partial updates that are sent only to those routers that the changes affect.

42. Dynamic ACL's are dependent on what?
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Telnet connectivity - authentication and extended ACLs
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Aka Subnet mask

43. Benefits of OSPF?
4
Domain
Scalable and fast convergence
30-50 seconds

44. With ACL's where does the router extract information
Make sure trunking is established. Ensure that dot1q encapsulation is set - and then for each subinterface do this encapsulation dot1Q 2 where 2 is the VLAN associated with that interface
Packet Header
Unspecified
Packets are processed before they are routed to an outbound interface.

45. Can you delete individual entries in a specific ACL?
Only with Cisco IOS software release 12.3 (2) T
Domain
Convergence
Every 5 seconds

46. Spanning-Tree coast of 4
Convergence
1Gb/s
Unspecified
Distance Vector

47. Every ACL will need what?
A permit statement
Inter-VLAN routing
2^n-2
Layers 1 & 2

48. What is the multicast address for EIGRP?
To select the best path to the destination
Routes First/ Tests second
1
224.0.0.10

49. Routers are used for what?
Domain
To select the best path to the destination
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Telnet connectivity - authentication and extended ACLs

50. The time delay for a router to match a network change?
To select the best path to the destination
Convergence
Autonomous System
MD5 and you have to enable it if you want to use it.