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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. In Link state terminology - What is a link?
A group of end stations with a common set of requirements - independent of their physical location
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
A link is an interface on a router
Adjacency

2. What is needed to pass traffic from one VLAN to another?
A layer 3 switch or router
Disable auto summarization
Link-State
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs

3. What is the Wildcard mask
The inverse of a subnet mask.
Propagation of partial updates that are sent only to those routers that the changes affect.
IETF
4 times the hello interval

4. Problem with RIP
Susceptible to routing loops
224.0.0.10
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.
1

5. Break down the word Link-State

6. What are non designated routers called?
Maximizing address efficiency - organization - summarization
Every 10 Seconds
Every 5 seconds
DROTHER

7. What is one to nearest
Link-State
Anycast
110
224.0.0.10

8. What is the purpose of LMI
16
It is the signaling standard that maintains connection and statues between the DCE and DTE
RIPv2 & EIGRP
224.0.0.5

9. VTP Transparent Mode does what?

10. How often are periodic updates sent out via RIP
Every 30 Seconds
224.0.0.10
Automatically
4

11. What is a VLAN
Because a loopback interface is always active and cannot be in a down state like a real interface can.
RIPv2 and EIGRP
224.0.0.10
A group of end stations with a common set of requirements - independent of their physical location

12. What Layer does Frame Relay operate at?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
A backbone area...Also known as Area 0
All backup routes for destinations.
Layers 1 & 2

13. An autonomous system could also be referred to as what?
Data Link Connection Identifier
Domain
Only topology within their respective area.
EIGRP - OSPF - RIP

14. How does an outbound ACL work?
Routes First/ Tests second
Scalable and fast convergence
A backbone area...Also known as Area 0
Designated Router (DR) and a Back-up designated Router (BDR)

15. How do you configure a sub interface?
No
Inter-VLAN routing
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
It is never useful to send information about a route back in the direction from which the original info came.

16. Who designed OSPF?
2^n
Every 10 seconds
IETF
Telnet connectivity - authentication and extended ACLs

17. What are the two ways routers can learn about the destination information?
Multicast
Reduce the link-state database and routing table
Packets are processed before they are routed to an outbound interface.
1.) Enter the Routing Manually 2.) Use Dymamic Routing

18. What is one to many?
Multicast
To reduce OSPF traffic
Every 10 Seconds
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

19. Purpose of a Routing Protocol?
Loopback
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Forces protocols to behave as if they were classless

20. What algorithm does EIGRP use?
16
0
One ACL per protocol - One ACL per direction - Once ACL per interface
The Diffusing Update Algorithm (DUAL)

21. What is the default Bridge priority?
32768
A trunk
Unicast - Multicast - Anycast
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

22. What two things need to be done to enable dynamic routing?
Multiple virtual interfaces that are associated with one physical interface
120
Select the routing protocol - then specify the network.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

23. Describe features of RIPv2
MD5 and you have to enable it if you want to use it.
Automatically
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Packets are processed before they are routed to an outbound interface.

24. The time delay for a router to match a network change?
Convergence
DROTHER
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Data Link Connection Identifier

25. By default OSPF uses what type of authentication?
Plaintext and MD5
Each router builds a map of the network and determines the shortest path to every network.
Null
...

26. For a VLAN to span across multiple switches What is required?
A trunk
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
A protocol on how to communicate with other routers
Cisco - ANSI - Q.933A

27. How do you configure OSPF
100Mb/s
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Advance Distance Vector
Multicast

28. Rip is capable of load balancing over as many as?
Six equal cost paths
Supports both unequal metric load balancing and equal metric balancing.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

29. How does an Extended ACL work?
Domain
All backup routes for destinations.
Checks the source and destination address then permits or denies specific protocols
Multicast

30. How often does a router send link-state advertisements?
Every 30 minutes by default
Data Link Connection Identifier
Private: link local
...

31. What is the default for equal cost paths for load balancing with OSPF?
Propagation of partial updates that are sent only to those routers that the changes affect.
4
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

32. What is the default load balancing for RIP
4
Layers 1 & 2
Propagation of partial updates that are sent only to those routers that the changes affect.
2^n

33. Problem with static routes
32768
Not scalable - hard to maintain as the network grows
Bandwidth & Delay
...

34. What are two OSPF authentication methods?
TRUE
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Designated Router (DR) and a Back-up designated Router (BDR)
Plaintext and MD5

35. Explain OSPF

36. What does DLCI stand for?
Port based
Dijkstra's Algorithm
MD5 and you have to enable it if you want to use it.
Data Link Connection Identifier

37. Example of a Routing Protocol?
EIGRP - OSPF - RIP
Advertised Distance & Feasible distance
Multicast
Bandwidth & Delay

38. What is an Autonomous System?
...
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Only topology within their respective area.
One ACL per protocol - One ACL per direction - Once ACL per interface

39. Why is this done?
A permit statement
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Anycast
To reduce OSPF traffic

40. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Every 30 minutes by default
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
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.
IP

41. How does the SPF determine the shortest path?
Determines the cost which is the bandwidth
The inverse of a subnet mask.
Routes First/ Tests second
Dijkstra's Algorithm

42. Why is it important to have a loopback address when using OSPF?
Layers 1 & 2
Susceptible to routing loops
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Routes First/ Tests second

43. Nonbackbone - internal routers are aware of what topology
A link is an interface on a router
Aka Subnet mask
Only topology within their respective area.
Dijkstra's Algorithm

44. 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.
10Mb/s
Carry's traffic for multiple VLANS
A protocol on how to communicate with other routers

45. What two parameters does EIGRP use to determine the best route?
Advertised Distance & Feasible distance
A combination of Link-state and distance vector
EIGRP - OSPF - RIP
By DLCI's

46. Explain how routing loops occur with RIP?
Link-State
2^n
...
Private: link local

47. How often are LMI's sent out?
Every 10 Seconds
Null
Not scalable - hard to maintain as the network grows
Layers 1 & 2

48. Dynamic ACL's are dependent on what?
Unspecified
Telnet connectivity - authentication and extended ACLs
Private: link local
2^n-2

49. What does the back bone router do?
Connects the different areas
Area Border Router
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Updates all DROTHER Routers when a change occurs

50. What type of authentication does EIGRP use?
Every 30 Seconds
Port based
IP
MD5 and you have to enable it if you want to use it.