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 is an EUI-64 format interface ID created from a 48-Bit MAC address
Maximizing address efficiency - organization - summarization
Link-State
Convergence
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

2. How does inbound ACL work?
Plaintext and MD5
Test Firsts/ Routes Second
Updates all DROTHER Routers when a change occurs
Determines the cost which is the bandwidth

3. What does the DR do?
Updates all DROTHER Routers when a change occurs
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Autonomous System
Unspecified

4. What is the dead interval
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
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
The Root bridge is the bridge with the lowest bridge ID
The update only includes info about the route change

5. How often are LMI's sent out?
RIPv2 and EIGRP
The Diffusing Update Algorithm (DUAL)
Every 10 Seconds
A permit statement

6. What does DLCI stand for?
Data Link Connection Identifier
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
2^n-2
Only with Cisco IOS software release 12.3 (2) T

7. Dynamic ACL's are dependent on what?
Telnet connectivity - authentication and extended ACLs
To reduce OSPF traffic
Inter-VLAN routing
Every 5 seconds

8. What is the default Bridge priority?
32768
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Checks the source and destination address then permits or denies specific protocols
Private: link local

9. How do you configure a sub interface?
Unspecified
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
Every 5 seconds
By DLCI's

10. What is an ABR
Area Border Router
Multiple virtual interfaces that are associated with one physical interface
Every 10 Seconds
4

11. Spanning-Tree coast of 4
1
MAC based
1Gb/s
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication

12. In regards to troubleshooting OSPF what should you check?
Every 10 Seconds
It is the signaling standard that maintains connection and statues between the DCE and DTE
Packets are processed before they are routed to an outbound interface.
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

13. Purpose of a Routing Protocol?
1
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Forces protocols to behave as if they were classless

14. The advantages of VLSM
MD5 and you have to enable it if you want to use it.
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Maximizing address efficiency - organization - summarization
Adjacency

15. When do you use Access-Class
Associating the network address with a local DLCI.
A trunk
Every 5 seconds
For line vty 0 4

16. With ACL's where does the router extract information
30-50 seconds
Unicast - Multicast - Anycast
Packet Header
224.0.0.10

17. In Link state terminology - What is a link?
Every 10 seconds
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
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

18. Benefits of OSPF?
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Every 10 seconds
Scalable and fast convergence
Bandwidth & Delay

19. With OSPF - there must always be a area......
Cisco - ANSI - Q.933A
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
0
224.0.0.10

20. What is the purpose of LMI
TRUE
Adjacency
It is the signaling standard that maintains connection and statues between the DCE and DTE
The lower MAC address

21. Why is EIGRP considered a Hybrid routing protocol?
By DLCI's
It combines the advantages of Link-State and Distance vector routing protocols.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Convergence

22. Describe features of RIPv1
20 seconds: 10 missed BPDU's
1
100Mb/s
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

23. How often does EIGRP send hellow packets?
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.
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Every 5 seconds

24. Example of a Routed Protocol?
View
...
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
IP

25. What is ::1
It is never useful to send information about a route back in the direction from which the original info came.
Distance Vector
Susceptible to routing loops
Loopback

26. What is Frame Relay?
Multiple virtual interfaces that are associated with one physical interface
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Private: link local
...

27. An autonomous system could also be referred to as what?
4 times the hello interval
The Root bridge is the bridge with the lowest bridge ID
Domain
For line vty 0 4

28. What is a VLAN
MAC based
Only with Cisco IOS software release 12.3 (2) T
Advertised Distance & Feasible distance
A group of end stations with a common set of requirements - independent of their physical location

29. Explain OSPF

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30. Every ACL will need what?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
By DLCI's
A permit statement
DROTHER

31. Routers are used for what?
Checks the source and destination address then permits or denies specific protocols
To select the best path to the destination
TRUE
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.

32. Spanning-Tree cost of 19
100Mb/s
Advertised Distance & Feasible distance
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. How do you apply the ACL to an interface
Null
0
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Every 30 minutes by default

34. What are two OSPF authentication methods?
Adjacency
Inter-VLAN routing
By DLCI's
Plaintext and MD5

35. Problem with static routes
1
Not scalable - hard to maintain as the network grows
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
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.

36. What type of algorithm does RIP use?
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Packet Header
Distance Vector
Carry's traffic for multiple VLANS

37. How does Link-State work?
RIPv2 & EIGRP
DROTHER
Maximizing address efficiency - organization - summarization
Each router builds a map of the network and determines the shortest path to every network.

38. Formula for determining Subnets
TRUE
2^n
Data Link Connection Identifier
224.0.0.5

39. What algorithm does EIGRP use?
The Diffusing Update Algorithm (DUAL)
Different Autonomous Systems
Checks the source address and then permits or denies the entire protocol suite
Make sure you are in interface mode - then use this command ip access-group 1 out/in

40. Who designed OSPF?
2^n
IETF
0
Autonomous System

41. How does an Extended ACL work?
Automatically
4
Checks the source and destination address then permits or denies specific protocols
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.

42. What is one to nearest
A trunk
Anycast
Designated Router (DR) and a Back-up designated Router (BDR)
DROTHER

43. What is needed to pass traffic from one VLAN to another?
Autonomous System
224.0.0.5
Connects the different areas
A layer 3 switch or router

44. Admin distance of EIGRP?
Null
Every 10 seconds
90
Updates all DROTHER Routers when a change occurs

45. Rip is capable of load balancing over as many as?
Six equal cost paths
...
0
Forces protocols to behave as if they were classless

46. How does an outbound ACL work?
Autonomous System
Select the routing protocol - then specify the network.
It is never useful to send information about a route back in the direction from which the original info came.
Routes First/ Tests second

47. Explain how routing loops occur with RIP?
...
Every 30 minutes by default
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Aka Subnet mask

48. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
TRUE
Adjacency
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
0

49. The no auto-summary command does what?
100Mb/s
Ever 2 seconds
The Root bridge is the bridge with the lowest bridge ID
Forces protocols to behave as if they were classless

50. Nonbackbone - internal routers are aware of what topology
4
Only topology within their respective area.
1.) Enter the Routing Manually 2.) Use Dymamic Routing
MD5 and you have to enable it if you want to use it.