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. Admin distance of a Static Route?
...
1
Every 30 minutes by default
224.0.0.5

2. Problem with static routes
Not scalable - hard to maintain as the network grows
Anycast
Supports both unequal metric load balancing and equal metric balancing.
1.) Enter the Routing Manually 2.) Use Dymamic Routing

3. What does the back bone router do?
32768
Unicast - Multicast - Anycast
Connects the different areas
Domain

4. How does an Extended ACL work?
Automatically
A backbone area...Also known as Area 0
Associating the network address with a local DLCI.
Checks the source and destination address then permits or denies specific protocols

5. How does EIGRP work with regards to Load Balancing
Supports both unequal metric load balancing and equal metric balancing.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Because a loopback interface is always active and cannot be in a down state like a real interface can.

6. For a VLAN to span across multiple switches What is required?
A trunk
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Cisco - ANSI - Q.933A
30-50 seconds

7. How often are OSPF hello packets sent out?
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Every 10 seconds
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
RIPv2 & EIGRP

8. What does DLCI stand for?
Connects the different areas
Updates all DROTHER Routers when a change occurs
Data Link Connection Identifier
Forces protocols to behave as if they were classless

9. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
Carry's traffic for multiple VLANS
The inverse of a subnet mask.
The lower MAC address
No

10. Example of a Routing Protocol?
...
Multiple virtual interfaces that are associated with one physical interface
EIGRP - OSPF - RIP
Advance Distance Vector

11. How do you configure a sub interface?
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
Packets are processed before they are routed to an outbound interface.
Different Autonomous Systems

12. Formula for determining Subnets
2^n
Every 10 Seconds
Each router builds a map of the network and determines the shortest path to every network.
16

13. When placing ACL's in the Network...Do what?

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14. What is one to many?
Distance Vector
Only topology within their respective area.
Layers 1 & 2
Multicast

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

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16. How are Frame Relay Circuits identified?

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17. What is the multicast address for EIGRP?
Susceptible to routing loops
No
224.0.0.10
Checks the source address and then permits or denies the entire protocol suite

18. Benefits of OSPF?
Updates all DROTHER Routers when a change occurs
20 seconds: 10 missed BPDU's
224.0.0.10
Scalable and fast convergence

19. Why is this done?
Propagation of partial updates that are sent only to those routers that the changes affect.
MD5 and you have to enable it if you want to use it.
To reduce OSPF traffic
Automatically

20. Normal time for STP convergence
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
It is never useful to send information about a route back in the direction from which the original info came.
30-50 seconds
Carry's traffic for multiple VLANS

21. Can a Router exchange routing information if they are using different Routing Protocols?
Automatically
No
Packets are processed before they are routed to an outbound interface.
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

22. How does the SPF determine the shortest path?
Determines the cost which is the bandwidth
The update only includes info about the route change
Susceptible to routing loops
A permit statement

23. Why is EIGRP considered a Hybrid routing protocol?
TRUE
Carry's traffic for multiple VLANS
Each router builds a map of the network and determines the shortest path to every network.
It combines the advantages of Link-State and Distance vector routing protocols.

24. What does bounded refer to?
Domain
Propagation of partial updates that are sent only to those routers that the changes affect.
2^n
Select the routing protocol - then specify the network.

25. What are subinterfaces?
4
RIPv2 & EIGRP
Multiple virtual interfaces that are associated with one physical interface
Routes First/ Tests second

26. What are two OSPF authentication methods?
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
90
100Mb/s

27. An OSPF neighbor relationship can also be called what?
Adjacency
Packet Header
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
A trunk

28. How does an outbound ACL work?
Disable auto summarization
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Routes First/ Tests second
4 times the hello interval

29. Problem with RIP
Domain
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Susceptible to routing loops
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

30. OSPF routes packets within a single?
Routes First/ Tests second
Autonomous System
To reduce OSPF traffic
16

31. Can you delete individual entries in a specific ACL?
The Root bridge is the bridge with the lowest bridge ID
Only with Cisco IOS software release 12.3 (2) T
Checks the source address and then permits or denies the entire protocol suite
It combines the advantages of Link-State and Distance vector routing protocols.

32. What is prefix length?
Aka Subnet mask
Individual or group IP's
Anycast
Supports both unequal metric load balancing and equal metric balancing.

33. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Multiple virtual interfaces that are associated with one physical interface
MAC based
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
16

34. What is needed to pass traffic from one VLAN to another?
A layer 3 switch or router
Advertised Distance & Feasible distance
Autonomous System
Every 5 seconds

35. Summarization of network information usually occurs where?
Domain
Packets are processed before they are routed to an outbound interface.
Automatically
Between areas?

36. Spanning-Tree cost of 100
RIPv2 & EIGRP
Determines the cost which is the bandwidth
A trunk
10Mb/s

37. With ACL's where does the router extract information
Packet Header
One ACL per protocol - One ACL per direction - Once ACL per interface
Each router builds a map of the network and determines the shortest path to every network.
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration

38. Formula for determining hosts
2^n-2
Bandwidth & Delay
MAC based
Scalable and fast convergence

39. Dynamic ACL's are dependent on what?
Maximizing address efficiency - organization - summarization
A permit statement
Telnet connectivity - authentication and extended ACLs
The lower MAC address

40. What two classless protocols act classful by default?
Distance Vector
MD5 and you have to enable it if you want to use it.
RIPv2 & EIGRP
Each router builds a map of the network and determines the shortest path to every network.

41. Dynamic VLAN is what?
Susceptible to routing loops
Multicast
Cisco - ANSI - Q.933A
MAC based

42. What is OSPF multicast address?
Associating the network address with a local DLCI.
Forces protocols to behave as if they were classless
Loopback
224.0.0.5

43. What is the Wildcard mask
Match on all routers or it will not work
Automatically
The inverse of a subnet mask.
Between areas?

44. What is an ABR
Area Border Router
1
Cisco - ANSI - Q.933A
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

45. Describe features of RIPv1
To select the best path to the destination
32768
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
IP

46. With OSPF - there must always be a area......
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Connects the different areas
0
1Gb/s

47. Spanning-Tree coast of 4
Every 5 seconds
Telnet connectivity - authentication and extended ACLs
1Gb/s
A combination of Link-state and distance vector

48. In regards to troubleshooting OSPF what should you check?
Connects the different areas
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Six equal cost paths

49. Admin distance of EIGRP?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Disable auto summarization
90
Select the routing protocol - then specify the network.

50. What do you need to do if there are discontigous networks with EIGRP?
Disable auto summarization
Telnet connectivity - authentication and extended ACLs
Packets are processed before they are routed to an outbound interface.
Every 30 Seconds