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. What is the default for equal cost paths for load balancing with OSPF?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
A layer 3 switch or router
4
Convergence

2. Admin distance of a connected Network?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
0
Checks the source and destination address then permits or denies specific protocols
TRUE

3. How long is the dead interval
4 times the hello interval
Advertised Distance & Feasible distance
By DLCI's
The inverse of a subnet mask.

4. What is the Shortest Path First algorithm also called?

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5. OSPF routes packets within a single?
Distance Vector
View
Every 30 Seconds
Autonomous System

6. When do you use Access-Class
A group of end stations with a common set of requirements - independent of their physical location
...
Forces protocols to behave as if they were classless
For line vty 0 4

7. What is the default load balancing for RIP
A trunk
Automatically
10Mb/s
4

8. How often does a router send link-state advertisements?
Every 30 minutes by default
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Different Autonomous Systems
20 seconds: 10 missed BPDU's

9. How does the SPF determine the shortest path?
Every 5 seconds
EIGRP - OSPF - RIP
Determines the cost which is the bandwidth
Distance Vector

10. Describe an Outbound ACL
TRUE
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
10Mb/s
To select the best path to the destination

11. Explain OSPF

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12. What is one to many?
Multicast
Null
224.0.0.10
Link-State

13. What is an Autonomous System?
RIPv2 & EIGRP
Bandwidth & Delay
...
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

14. What are the two ways routers can learn about the destination information?
110
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Connects the different areas

15. Rip is capable of load balancing over as many as?
IP
Six equal cost paths
Advance Distance Vector
TRUE

16. Every ACL will need what?
A permit statement
...
A layer 3 switch or router
Port based

17. For an adjacency to occur what do the routers have to agree on?
MD5 and you have to enable it if you want to use it.
1Gb/s
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.

18. What two classless protocols act classful by default?
4
15.....16 hops and the interface is down
Because a loopback interface is always active and cannot be in a down state like a real interface can.
RIPv2 & EIGRP

19. How do you configure OSPF
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
...
Individual or group IP's

20. How does EIGRP work with regards to Load Balancing
Supports both unequal metric load balancing and equal metric balancing.
It is never useful to send information about a route back in the direction from which the original info came.
Maximizing address efficiency - organization - summarization
Different Autonomous Systems

21. The AS number must what?
Match on all routers or it will not work
Make sure you are in interface mode - then use this command ip access-group 1 out/in
The lower MAC address
Private: link local

22. Static VLAN is what?
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Port based
Link-State
Autonomous System

23. What are two OSPF authentication methods?
Area Border Router
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Plaintext and MD5
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. What does bounded refer to?
Multicast
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
32768
Propagation of partial updates that are sent only to those routers that the changes affect.

25. What does partial refer to?
100Mb/s
Multicast
The update only includes info about the route change
...

26. Who designed OSPF?
IETF
2^n-2
224.0.0.5
Port based

27. The no auto-summary command does what?
A trunk
Forces protocols to behave as if they were classless
Dijkstra's Algorithm
Every 5 seconds

28. Wildcard masks filter

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29. Explain how routing loops occur with RIP?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
MD5 and you have to enable it if you want to use it.
...
Connects the different areas

30. What is Frame Relay?
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
224.0.0.5
Port based
Advance Distance Vector

31. In Link state terminology - What is a link?
DROTHER
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
A link is an interface on a router
MAC based

32. What is the purpose of LMI
It is the signaling standard that maintains connection and statues between the DCE and DTE
Telnet connectivity - authentication and extended ACLs
Six equal cost paths
Adjacency

33. A router running EIGRP will store what?
Automatically
Plaintext and MD5
Maximizing address efficiency - organization - summarization
All backup routes for destinations.

34. In frame relay What is Inverse Arp
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
Layers 1 & 2
Associating the network address with a local DLCI.
Not scalable - hard to maintain as the network grows

35. How often are LMI's sent out?
Private: link local
Every 10 Seconds
Null
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.

36. What is the default Bridge priority?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Unspecified
Susceptible to routing loops
32768

37. How does an outbound ACL work?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Disable auto summarization
A link is an interface on a router
Routes First/ Tests second

38. With OSPF - what must be defined?
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
A backbone area...Also known as Area 0
The lower MAC address
Link-State

39. How do you configure a sub interface?
Individual or group IP's
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
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

40. The time delay for a router to match a network change?
Convergence
Inter-VLAN routing
16
Not scalable - hard to maintain as the network grows

41. The advantages of VLSM
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.
Maximizing address efficiency - organization - summarization
1
Loopback

42. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
View
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Determines the cost which is the bandwidth
The Root bridge is the bridge with the lowest bridge ID

43. Routing protocol is what?
30-50 seconds
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
A protocol on how to communicate with other routers
Only with Cisco IOS software release 12.3 (2) T

44. What algorithm does EIGRP use?
90
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 VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
The Diffusing Update Algorithm (DUAL)

45. What does DLCI stand for?
All backup routes for destinations.
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Data Link Connection Identifier
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.

46. What does EIGRP use to calculate it's metric?
The Root bridge is the bridge with the lowest bridge ID
Scalable and fast convergence
Bandwidth & Delay
The lower MAC address

47. What is the multicast address for EIGRP?
224.0.0.10
TRUE
No
Carry's traffic for multiple VLANS

48. Advance Distance Vector or Hybrid uses what?
EIGRP - OSPF - RIP
Domain
1Gb/s
A combination of Link-state and distance vector

49. What is prefix length?
Aka Subnet mask
Autonomous System
Advance Distance Vector
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

50. What are the three LMI standards
Advance Distance Vector
Cisco - ANSI - Q.933A
Maximizing address efficiency - organization - summarization
It is never useful to send information about a route back in the direction from which the original info came.