Test your basic knowledge |

CCNA

Instructions:

Answer 50 questions in 15 minutes.
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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 dead interval
Convergence
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
1
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs

2. Problem with RIP
Susceptible to routing loops
Six equal cost paths
Unicast - Multicast - Anycast
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

3. What is passing VLAN traffic to another called?
It is the signaling standard that maintains connection and statues between the DCE and DTE
Inter-VLAN routing
0
Checks the source and destination address then permits or denies specific protocols

4. For an adjacency to occur what do the routers have to agree on?
Distance Vector
A layer 3 switch or router
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
To select the best path to the destination

5. In regards to ACL's What are the three protocols?
...
0
Ever 2 seconds
One ACL per protocol - One ACL per direction - Once ACL per interface

6. What is a VLAN
A group of end stations with a common set of requirements - independent of their physical location
Test Firsts/ Routes Second
Supports both unequal metric load balancing and equal metric balancing.
15.....16 hops and the interface is down

7. How long is the dead interval
Different Autonomous Systems
4 times the hello interval
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Private: link local

8. How does inbound ACL work?
Test Firsts/ Routes Second
Maximizing address efficiency - organization - summarization
Inter-VLAN routing
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

9. What two parameters does EIGRP use to determine the best route?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Advertised Distance & Feasible distance
Every 5 seconds

10. How often are LMI's sent out?
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
TRUE
Every 10 Seconds
A link is an interface on a router

11. What do area's do?
...
224.0.0.10
Individual or group IP's
Reduce the link-state database and routing table

12. Explain how routing loops occur with RIP?
To select the best path to the destination
1
Individual or group IP's
...

13. What does a trunk do?

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14. What are the major components of OSPF troubleshooting?
Each router builds a map of the network and determines the shortest path to every network.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
1
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

15. What does the back bone router do?
All backup routes for destinations.
Connects the different areas
The Root bridge is the bridge with the lowest bridge ID
EIGRP - OSPF - RIP

16. Can you delete individual entries in a specific ACL?
Connects the different areas
Only with Cisco IOS software release 12.3 (2) T
Propagation of partial updates that are sent only to those routers that the changes affect.
Carry's traffic for multiple VLANS

17. What does bounded refer to?
110
Propagation of partial updates that are sent only to those routers that the changes affect.
TRUE
Supports both unequal metric load balancing and equal metric balancing.

18. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
By DLCI's
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
TRUE
Convergence

19. Why is this done?
To reduce OSPF traffic
It is the signaling standard that maintains connection and statues between the DCE and DTE
Anycast
Individual or group IP's

20. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
A permit statement
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
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.
For line vty 0 4

21. The time delay for a router to match a network change?
32768
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
To select the best path to the destination
Convergence

22. What is an Autonomous System?
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Scalable and fast convergence
RIPv2 and EIGRP
...

23. Rip is capable of load balancing over as many as?
To select the best path to the destination
Only with Cisco IOS software release 12.3 (2) T
Aka Subnet mask
Six equal cost paths

24. What type of algorithm does EIGRP use?
Advance Distance Vector
224.0.0.5
Autonomous System
4

25. Can a Router exchange routing information if they are using different Routing Protocols?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
MD5 and you have to enable it if you want to use it.
...
No

26. How does EIGRP work with regards to Load Balancing
Supports both unequal metric load balancing and equal metric balancing.
Maximizing address efficiency - organization - summarization
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Only with Cisco IOS software release 12.3 (2) T

27. Formula for determining Subnets
2^n
Updates all DROTHER Routers when a change occurs
A link is an interface on a router
Maximizing address efficiency - organization - summarization

28. How does Link-State work?
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
The inverse of a subnet mask.
Each router builds a map of the network and determines the shortest path to every network.
Packets are processed before they are routed to an outbound interface.

29. OSPF will elect a what?
Designated Router (DR) and a Back-up designated Router (BDR)
DROTHER
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.
110

30. How do you apply the ACL to an interface
Make sure you are in interface mode - then use this command ip access-group 1 out/in
16
View
It is the signaling standard that maintains connection and statues between the DCE and DTE

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

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32. What is the default for equal cost paths for load balancing with OSPF?
4
A combination of Link-state and distance vector
Unspecified
4 times the hello interval

33. Dynamic VLAN is what?
Only with Cisco IOS software release 12.3 (2) T
MAC based
Every 10 seconds
Distance Vector

34. Routing protocol is what?
A protocol on how to communicate with other routers
0
Anycast
A combination of Link-state and distance vector

35. How does an Extended ACL work?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
MAC based
224.0.0.5
Checks the source and destination address then permits or denies specific protocols

36. Break down the word Link-State

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37. Classful Protocols summarize
224.0.0.10
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Supports both unequal metric load balancing and equal metric balancing.
Automatically

38. Problem with static routes
Not scalable - hard to maintain as the network grows
Every 30 minutes by default
The inverse of a subnet mask.
Packets are processed before they are routed to an outbound interface.

39. By default OSPF uses what type of authentication?
Null
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Link-State
No

40. Why is EIGRP considered a Hybrid routing protocol?
It combines the advantages of Link-State and Distance vector routing protocols.
Port based
Convergence
The Diffusing Update Algorithm (DUAL)

41. Spanning-Tree cost of 100
10Mb/s
Plaintext and MD5
A trunk
A permit statement

42. Exterior Gateway Protocols are designed for use between
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.
A group of end stations with a common set of requirements - independent of their physical location
It combines the advantages of Link-State and Distance vector routing protocols.
Different Autonomous Systems

43. Dynamic ACL's are dependent on what?
110
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Telnet connectivity - authentication and extended ACLs
Unicast - Multicast - Anycast

44. Routers are used for what?
100Mb/s
Private: link local
To select the best path to the destination
The inverse of a subnet mask.

45. How are Frame Relay Circuits identified?

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46. What is one to many?
It is never useful to send information about a route back in the direction from which the original info came.
Multicast
MD5 and you have to enable it if you want to use it.
Checks the source address and then permits or denies the entire protocol suite

47. Why is it important to have a loopback address when using OSPF?
IETF
Packets are processed before they are routed to an outbound interface.
Because a loopback interface is always active and cannot be in a down state like a real interface can.
For line vty 0 4

48. What is the purpose of LMI
It is the signaling standard that maintains connection and statues between the DCE and DTE
Individual or group IP's
MAC based
One ACL per protocol - One ACL per direction - Once ACL per interface

49. What do you need to do if there are discontigous networks with EIGRP?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
4 times the hello interval
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Disable auto summarization

50. Summarization of network information usually occurs where?
It is the signaling standard that maintains connection and statues between the DCE and DTE
Between areas?
Scalable and fast convergence
Propagation of partial updates that are sent only to those routers that the changes affect.

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