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. Explain how routing loops occur with RIP?
To reduce OSPF traffic
A backbone area...Also known as Area 0
...
10Mb/s

2. What are the three LMI standards
Cisco - ANSI - Q.933A
...
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Checks the source address and then permits or denies the entire protocol suite

3. Spanning-Tree coast of 4
Associating the network address with a local DLCI.
Area Border Router
1Gb/s
Convergence

4. What does a trunk do?

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5. Admin distance of a connected Network?
30-50 seconds
Convergence
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

6. What is an Autonomous System?
A group of end stations with a common set of requirements - independent of their physical location
Telnet connectivity - authentication and extended ACLs
...
Plaintext and MD5

7. How is the root bridge determined?
Forces protocols to behave as if they were classless
The Root bridge is the bridge with the lowest bridge ID
Dijkstra's Algorithm
A backbone area...Also known as Area 0

8. What is OSPF multicast address?
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
224.0.0.5
Because a loopback interface is always active and cannot be in a down state like a real interface can.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication

9. Benefits of OSPF?
Scalable and fast convergence
15.....16 hops and the interface is down
Autonomous System
Packet Header

10. For a VLAN to span across multiple switches What is required?
Determines the cost which is the bandwidth
A trunk
Data Link Connection Identifier
Link-State

11. What is Frame Relay?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
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
Anycast

12. What two things need to be done to enable dynamic routing?
A combination of Link-state and distance vector
Select the routing protocol - then specify the network.
Bandwidth & Delay
Cisco - ANSI - Q.933A

13. What does EIGRP use to calculate it's metric?
Designated Router (DR) and a Back-up designated Router (BDR)
Bandwidth & Delay
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Dijkstra's Algorithm

14. What is the purpose of LMI
15.....16 hops and the interface is down
Cisco - ANSI - Q.933A
It is the signaling standard that maintains connection and statues between the DCE and DTE
4

15. What is a VLAN
0
Link-State
A group of end stations with a common set of requirements - independent of their physical location
Private: link local

16. Purpose of a Routing Protocol?
A permit statement
MAC based
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Not scalable - hard to maintain as the network grows

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

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18. In frame relay What is Inverse Arp
Distance Vector
Domain
Routes First/ Tests second
Associating the network address with a local DLCI.

19. The no auto-summary command does what?
Inter-VLAN routing
The Diffusing Update Algorithm (DUAL)
Forces protocols to behave as if they were classless
A group of end stations with a common set of requirements - independent of their physical location

20. What is ::
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Checks the source address and then permits or denies the entire protocol suite
Unspecified
Forces protocols to behave as if they were classless

21. How are Frame Relay Circuits identified?

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22. What type of authentication does EIGRP use?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
2^n-2
MD5 and you have to enable it if you want to use it.
Test Firsts/ Routes Second

23. What is the default Bridge priority?
32768
A group of end stations with a common set of requirements - independent of their physical location
A permit statement
Forces protocols to behave as if they were classless

24. What distant vector protocols exhibit classless behavior?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Every 30 minutes by default
RIPv2 and EIGRP
Make sure you are in interface mode - then use this command ip access-group 1 out/in

25. With ACL's where does the router extract information
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.
Every 10 Seconds
Packet Header
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.

26. What is the dead interval
32768
Advertised Distance & Feasible distance
It combines the advantages of Link-State and Distance vector routing protocols.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.

27. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
110
View
4

28. How often are OSPF hello packets sent out?
Carry's traffic for multiple VLANS
Checks the source and destination address then permits or denies specific protocols
Every 10 seconds
0

29. The time delay for a router to match a network change?
View
1Gb/s
Convergence
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

30. What type of algorithm does OSPF & IS-IS use?
A trunk
Supports both unequal metric load balancing and equal metric balancing.
Link-State
It is never useful to send information about a route back in the direction from which the original info came.

31. How does Link-State work?
Advance Distance Vector
Packet Header
Each router builds a map of the network and determines the shortest path to every network.
IP

32. In regards to ACL's What are the three protocols?
One ACL per protocol - One ACL per direction - Once ACL per interface
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
0
20 seconds: 10 missed BPDU's

33. What type of algorithm does EIGRP use?
Advance Distance Vector
To reduce OSPF traffic
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Different Autonomous Systems

34. Spanning-Tree cost of 100
Only topology within their respective area.
A link is an interface on a router
10Mb/s
RIPv2 and EIGRP

35. The AS number must what?
Cisco - ANSI - Q.933A
Domain
Anycast
Match on all routers or it will not work

36. Exterior Gateway Protocols are designed for use between
16
32768
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Different Autonomous Systems

37. What are the two ways routers can learn about the destination information?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
4 times the hello interval
IETF
Advance Distance Vector

38. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
4
EIGRP - OSPF - RIP
The update only includes info about the route change

39. What are two OSPF authentication methods?
Plaintext and MD5
For line vty 0 4
Different Autonomous Systems
16

40. Example of a Routing Protocol?
EIGRP - OSPF - RIP
Individual or group IP's
15.....16 hops and the interface is down
Test Firsts/ Routes Second

41. When do you use Access-Class
Convergence
It combines the advantages of Link-State and Distance vector routing protocols.
A combination of Link-state and distance vector
For line vty 0 4

42. What address is FE80:/10
For line vty 0 4
Designated Router (DR) and a Back-up designated Router (BDR)
Reduce the link-state database and routing table
Private: link local

43. With OSPF - what must be defined?
0
A backbone area...Also known as Area 0
Every 10 Seconds
Connects the different areas

44. What do area's do?
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Reduce the link-state database and routing table
IP
Only with Cisco IOS software release 12.3 (2) T

45. Admin distance of OSPF?
A link is an interface on a router
The lower MAC address
Associating the network address with a local DLCI.
110

46. For an adjacency to occur what do the routers have to agree on?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
16
Layers 1 & 2
...

47. Admin distance of EIGRP?
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
90
MAC based
1.) Enter the Routing Manually 2.) Use Dymamic Routing

48. Advance Distance Vector or Hybrid uses what?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Connects the different areas
One ACL per protocol - One ACL per direction - Once ACL per interface
A combination of Link-state and distance vector

49. Why is this done?
Forces protocols to behave as if they were classless
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
To reduce OSPF traffic
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

50. What Layer does Frame Relay operate at?
Layers 1 & 2
All backup routes for destinations.
Null
A permit statement