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. How does a Standard ACL work?
Scalable and fast convergence
Checks the source address and then permits or denies the entire protocol suite
Layers 1 & 2
Updates all DROTHER Routers when a change occurs

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

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3. What are non designated routers called?
DROTHER
32768
Propagation of partial updates that are sent only to those routers that the changes affect.
Every 5 seconds

4. Normal time for STP convergence
16
30-50 seconds
Plaintext and MD5
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

5. Describe an Outbound ACL
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Carry's traffic for multiple VLANS
Every 30 Seconds
Packet Header

6. Admin distance of EIGRP?
90
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Port based
To select the best path to the destination

7. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
IETF
A trunk
2^n-2
TRUE

8. What does a trunk do?

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9. How do you configure a sub interface?
Port based
Select the routing protocol - then specify the network.
Test Firsts/ Routes Second
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

10. 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.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
4
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

11. How does EIGRP work with regards to Load Balancing
Plaintext and MD5
Supports both unequal metric load balancing and equal metric balancing.
A protocol on how to communicate with other routers
15.....16 hops and the interface is down

12. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
Susceptible to routing loops
...
Aka Subnet mask

13. What distant vector protocols exhibit classless behavior?
Maximizing address efficiency - organization - summarization
It combines the advantages of Link-State and Distance vector routing protocols.
RIPv2 and EIGRP
20 seconds: 10 missed BPDU's

14. By default OSPF uses what type of authentication?
Null
Inter-VLAN routing
10Mb/s
A combination of Link-state and distance vector

15. A router running EIGRP will store what?
0
10Mb/s
IETF
All backup routes for destinations.

16. The advantages of VLSM
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Maximizing address efficiency - organization - summarization
Unspecified
Carry's traffic for multiple VLANS

17. Spanning-Tree cost of 19
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
100Mb/s
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Carry's traffic for multiple VLANS

18. What is one to many?
Null
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
Multicast
4 times the hello interval

19. What two classless protocols act classful by default?
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.
Different Autonomous Systems
RIPv2 & EIGRP
Every 5 seconds

20. How do you apply the ACL to an interface
1
Area Border Router
Make sure you are in interface mode - then use this command ip access-group 1 out/in
224.0.0.10

21. What is needed to pass traffic from one VLAN to another?
A layer 3 switch or router
Autonomous System
Loopback
Carry's traffic for multiple VLANS

22. Explain how routing loops occur with RIP?
120
Adjacency
View
...

23. Purpose of a Routing Protocol?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Different Autonomous Systems
Only with Cisco IOS software release 12.3 (2) T
The lower MAC address

24. What is the dead interval
Inter-VLAN routing
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Multicast
EIGRP - OSPF - RIP

25. In regards to troubleshooting OSPF what should you check?
A link is an interface on a router
10Mb/s
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Test Firsts/ Routes Second

26. The time delay for a router to match a network change?
No
Designated Router (DR) and a Back-up designated Router (BDR)
Every 10 seconds
Convergence

27. Routers are used for what?
To select the best path to the destination
Forces protocols to behave as if they were classless
The Root bridge is the bridge with the lowest bridge ID
2^n

28. Admin distance of a connected Network?
DROTHER
0
Only topology within their respective area.
1

29. Problem with static routes
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.
Routes First/ Tests second
Not scalable - hard to maintain as the network grows
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs

30. Describe a Inbound ACL
Packets are processed before they are routed to an outbound interface.
By DLCI's
10Mb/s
The Root bridge is the bridge with the lowest bridge ID

31. Admin distance of RIPv2
120
Bandwidth & Delay
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Between areas?

32. How often does a router send link-state advertisements?
Private: link local
It is never useful to send information about a route back in the direction from which the original info came.
Layers 1 & 2
Every 30 minutes by default

33. Benefits of OSPF?
1
Layers 1 & 2
Autonomous System
Scalable and fast convergence

34. What three types of IPv6 address types are there?
The Diffusing Update Algorithm (DUAL)
90
Different Autonomous Systems
Unicast - Multicast - Anycast

35. Describe features of RIPv1
32768
4
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
To reduce OSPF traffic

36. How does an Extended ACL work?
10Mb/s
Checks the source and destination address then permits or denies specific protocols
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

37. Rip is capable of load balancing over as many as?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
2^n-2
Six equal cost paths

38. Problem with RIP
Ever 2 seconds
Only topology within their respective area.
Carry's traffic for multiple VLANS
Susceptible to routing loops

39. With OSPF - there must always be a area......
Propagation of partial updates that are sent only to those routers that the changes affect.
The Root bridge is the bridge with the lowest bridge ID
16
0

40. An OSPF neighbor relationship can also be called what?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Aka Subnet mask
A backbone area...Also known as Area 0
Adjacency

41. Nonbackbone - internal routers are aware of what topology
Domain
Between areas?
Only topology within their respective area.
Unspecified

42. Can you delete individual entries in a specific ACL?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Adjacency
Cisco - ANSI - Q.933A
Only with Cisco IOS software release 12.3 (2) T

43. In Link state terminology - What is a link?
A link is an interface on a router
Automatically
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

44. What is the multicast address for EIGRP?
Convergence
Multiple virtual interfaces that are associated with one physical interface
224.0.0.10
Ever 2 seconds

45. How is an EUI-64 format interface ID created from a 48-Bit MAC address
Anycast
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
A combination of Link-state and distance vector

46. Classful Protocols summarize
1.) Enter the Routing Manually 2.) Use Dymamic Routing
RIPv2 & EIGRP
Automatically
20 seconds: 10 missed BPDU's

47. How often are periodic updates sent out via RIP
To select the best path to the destination
30-50 seconds
Every 30 Seconds
4 times the hello interval

48. What do area's do?
Routes First/ Tests second
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
2^n-2
Reduce the link-state database and routing table

49. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
TRUE
15.....16 hops and the interface is down
View
Automatically

50. What type of algorithm does OSPF & IS-IS use?
Link-State
All backup routes for destinations.
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
0