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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. When do you use Access-Class
For line vty 0 4
20 seconds: 10 missed BPDU's
IP
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers

2. Max_age time for BPDU's

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3. What type of algorithm does EIGRP use?
Port based
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Advance Distance Vector
Loopback

4. What type of algorithm does RIP use?
Maximizing address efficiency - organization - summarization
Match on all routers or it will not work
Distance Vector
2^n-2

5. What algorithm does EIGRP use?
Automatically
A trunk
The Diffusing Update Algorithm (DUAL)
Advance Distance Vector

6. What is an ABR
Packets are processed before they are routed to an outbound interface.
1
Every 30 minutes by default
Area Border Router

7. Nonbackbone - internal routers are aware of what topology
Only topology within their respective area.
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Supports both unequal metric load balancing and equal metric balancing.
20 seconds: 10 missed BPDU's

8. How are Frame Relay Circuits identified?

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9. What do area's do?
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.
Plaintext and MD5
Reduce the link-state database and routing table
Maximizing address efficiency - organization - summarization

10. Why is it important to have a loopback address when using OSPF?
Every 10 Seconds
Because a loopback interface is always active and cannot be in a down state like a real interface can.
1
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

11. What is ::
Every 5 seconds
2^n-2
Designated Router (DR) and a Back-up designated Router (BDR)
Unspecified

12. What two parameters does EIGRP use to determine the best route?
Checks the source address and then permits or denies the entire protocol suite
Advertised Distance & Feasible distance
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Every 5 seconds

13. How do you configure OSPF
Packet Header
Port based
20 seconds: 10 missed BPDU's
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

14. What is the dead interval
2^n-2
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Determines the cost which is the bandwidth
0

15. Formula for determining Subnets
The Diffusing Update Algorithm (DUAL)
2^n
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
224.0.0.5

16. Admin distance of a Static Route?
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Advance Distance Vector
Data Link Connection Identifier
1

17. What is prefix length?
Aka Subnet mask
Carry's traffic for multiple VLANS
One ACL per protocol - One ACL per direction - Once ACL per interface
Reduce the link-state database and routing table

18. What is the Wildcard mask
Advance Distance Vector
The inverse of a subnet mask.
Scalable and fast convergence
100Mb/s

19. A router running EIGRP will store what?
All backup routes for destinations.
Adjacency
Every 30 Seconds
Every 5 seconds

20. An autonomous system could also be referred to as what?
Domain
For line vty 0 4
Disable auto summarization
Individual or group IP's

21. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
16
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.
Designated Router (DR) and a Back-up designated Router (BDR)
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

22. What is passing VLAN traffic to another called?
Inter-VLAN routing
90
...
EIGRP - OSPF - RIP

23. How does an Extended ACL work?
Propagation of partial updates that are sent only to those routers that the changes affect.
Unspecified
Multiple virtual interfaces that are associated with one physical interface
Checks the source and destination address then permits or denies specific protocols

24. How long is the dead interval
4 times the hello interval
224.0.0.5
1.) Enter the Routing Manually 2.) Use Dymamic Routing
20 seconds: 10 missed BPDU's

25. What is one to many?
Designated Router (DR) and a Back-up designated Router (BDR)
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Multicast
Adjacency

26. How often does EIGRP send hellow packets?
Adjacency
16
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Every 5 seconds

27. What does the back bone router do?
Advance Distance Vector
...
Connects the different areas
Scalable and fast convergence

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

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29. What is ::1
The lower MAC address
Loopback
It is never useful to send information about a route back in the direction from which the original info came.
Carry's traffic for multiple VLANS

30. In Link state terminology - What is a link?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
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 link is an interface on a router
Every 10 Seconds

31. Dynamic ACL's are dependent on what?
Telnet connectivity - authentication and extended ACLs
Layers 1 & 2
Inter-VLAN routing
Packets are processed before they are routed to an outbound interface.

32. How do you configure a sub interface?
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
By DLCI's
Test Firsts/ Routes Second
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.

33. Spanning-Tree coast of 4
Unspecified
The inverse of a subnet mask.
1Gb/s
No

34. In regards to ACL's What are the three protocols?
One ACL per protocol - One ACL per direction - Once ACL per interface
Test Firsts/ Routes Second
120
Maximizing address efficiency - organization - summarization

35. How many hops are allowed with RIP?
Multicast
It combines the advantages of Link-State and Distance vector routing protocols.
Link-State
15.....16 hops and the interface is down

36. For a VLAN to span across multiple switches What is required?
A backbone area...Also known as Area 0
A trunk
Every 30 Seconds
The lower MAC address

37. What is an Autonomous System?
32768
...
Multiple virtual interfaces that are associated with one physical interface
1

38. Explain OSPF

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39. Can a Router exchange routing information if they are using different Routing Protocols?
30-50 seconds
No
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
4 times the hello interval

40. Describe features of RIPv2
Null
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Bandwidth & Delay
Every 10 Seconds

41. What is one to nearest
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Null
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Anycast

42. Admin distance of a connected Network?
Match on all routers or it will not work
Each router builds a map of the network and determines the shortest path to every network.
0
Bandwidth & Delay

43. Why is this done?
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.
224.0.0.5
2^n-2
To reduce OSPF traffic

44. Benefits of OSPF?
Scalable and fast convergence
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Layers 1 & 2
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

45. 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.
90
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
2^n-2

46. With OSPF - there must always be a area......
Unspecified
0
Reduce the link-state database and routing table
Different Autonomous Systems

47. 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.
RIPv2 & EIGRP
No
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.

48. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
TRUE
Only with Cisco IOS software release 12.3 (2) T
Private: link local
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

49. What are subinterfaces?
Distance Vector
Aka Subnet mask
15.....16 hops and the interface is down
Multiple virtual interfaces that are associated with one physical interface

50. Spanning-Tree cost of 19
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Different Autonomous Systems
100Mb/s
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.