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. Formula for determining hosts
2^n-2
Unicast - Multicast - Anycast
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.


2. Break down the word Link-State

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3. Spanning-Tree cost of 19
...
Convergence
100Mb/s
Private: link local


4. What is ::1
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
1
Loopback
Six equal cost paths


5. Every ACL will need what?
Designated Router (DR) and a Back-up designated Router (BDR)
Domain
1.) Enter the Routing Manually 2.) Use Dymamic Routing
A permit statement


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

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7. Describe an Outbound ACL
The inverse of a subnet mask.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Unicast - Multicast - Anycast
90


8. Describe features of RIPv1
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
100Mb/s
A group of end stations with a common set of requirements - independent of their physical location
TRUE


9. How do you configure a sub interface?
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
Null
Convergence
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.


10. Summarization of network information usually occurs where?
Between areas?
0
A link is an interface on a router
Automatically


11. How does an Extended ACL work?
4
Every 5 seconds
32768
Checks the source and destination address then permits or denies specific protocols


12. How is an EUI-64 format interface ID created from a 48-Bit MAC address
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Multiple virtual interfaces that are associated with one physical interface
Loopback
Distance Vector


13. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
RIPv2 & EIGRP
16
Plaintext and MD5


14. Admin distance of EIGRP?
90
...
Distance Vector
224.0.0.10


15. Max_age time for BPDU's

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16. Admin distance of OSPF?
Match on all routers or it will not work
110
It is never useful to send information about a route back in the direction from which the original info came.
View


17. Spanning-Tree coast of 4
Because a loopback interface is always active and cannot be in a down state like a real interface can.
1Gb/s
Match on all routers or it will not work
Packets are processed before they are routed to an outbound interface.


18. What is prefix length?
Loopback
DROTHER
For line vty 0 4
Aka Subnet mask


19. What do area's do?
Reduce the link-state database and routing table
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
No
110


20. VTP Client Mode does what?

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21. What are non designated routers called?
It is never useful to send information about a route back in the direction from which the original info came.
The Root bridge is the bridge with the lowest bridge ID
A trunk
DROTHER


22. Problem with RIP
15.....16 hops and the interface is down
Associating the network address with a local DLCI.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Susceptible to routing loops


23. An OSPF neighbor relationship can also be called what?
Checks the source address and then permits or denies the entire protocol suite
Propagation of partial updates that are sent only to those routers that the changes affect.
Adjacency
Every 10 seconds


24. How do you apply the ACL to an interface
The update only includes info about the route change
Make sure you are in interface mode - then use this command ip access-group 1 out/in
MD5 and you have to enable it if you want to use it.
Port based


25. What does partial refer to?
The update only includes info about the route change
It combines the advantages of Link-State and Distance vector routing protocols.
The Root bridge is the bridge with the lowest bridge ID
Between areas?


26. Who designed OSPF?
Associating the network address with a local DLCI.
RIPv2 & EIGRP
Checks the source address and then permits or denies the entire protocol suite
IETF


27. What are two statements that are true of IPv6 address representation?
Convergence
Connects the different areas
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Determines the cost which is the bandwidth


28. Can a Router exchange routing information if they are using different Routing Protocols?
Associating the network address with a local DLCI.
RIPv2 and EIGRP
No
Advance Distance Vector


29. What is passing VLAN traffic to another called?
Multicast
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Inter-VLAN routing
View


30. How are Frame Relay Circuits identified?

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31. What does DLCI stand for?
Data Link Connection Identifier
224.0.0.10
224.0.0.5
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available


32. Normal time for STP convergence
Between areas?
Reduce the link-state database and routing table
30-50 seconds
1.) Enter the Routing Manually 2.) Use Dymamic Routing


33. Admin distance of RIPv2
Checks the source and destination address then permits or denies specific protocols
120
A link is an interface on a router
4


34. For a VLAN to span across multiple switches What is required?
Unspecified
Every 5 seconds
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
A trunk


35. How does Link-State work?
Match on all routers or it will not work
Each router builds a map of the network and determines the shortest path to every network.
...
IETF


36. Why is it important to have a loopback address when using OSPF?
One ACL per protocol - One ACL per direction - Once ACL per interface
Because a loopback interface is always active and cannot be in a down state like a real interface can.
All backup routes for destinations.
The lower MAC address


37. How does the SPF determine the shortest path?
Determines the cost which is the bandwidth
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Designated Router (DR) and a Back-up designated Router (BDR)
2^n-2


38. How often does EIGRP send hellow packets?
Select the routing protocol - then specify the network.
Every 5 seconds
0
TRUE


39. What does bounded refer to?
Propagation of partial updates that are sent only to those routers that the changes affect.
0
16
Aka Subnet mask


40. What is the Wildcard mask
4
Unspecified
Checks the source and destination address then permits or denies specific protocols
The inverse of a subnet mask.


41. Wildcard masks filter

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42. What distant vector protocols exhibit classless behavior?
RIPv2 and EIGRP
Associating the network address with a local DLCI.
Every 10 Seconds
Because a loopback interface is always active and cannot be in a down state like a real interface can.


43. What is the dead interval
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
RIPv2 and EIGRP
Not scalable - hard to maintain as the network grows
Only topology within their respective area.


44. How often does a router send link-state advertisements?
To reduce OSPF traffic
Aka Subnet mask
View
Every 30 minutes by default


45. Classful Protocols summarize
Automatically
120
Adjacency
Loopback


46. What two classless protocols act classful by default?
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
RIPv2 & EIGRP
Multiple virtual interfaces that are associated with one physical interface
1.) Enter the Routing Manually 2.) Use Dymamic Routing


47. What does EIGRP use to calculate it's metric?
110
Data Link Connection Identifier
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Bandwidth & Delay


48. What is the default Bridge priority?
Each router builds a map of the network and determines the shortest path to every network.
Adjacency
32768
A trunk


49. What is an ABR
Area Border Router
Supports both unequal metric load balancing and equal metric balancing.
Loopback
Maximizing address efficiency - organization - summarization


50. The advantages of VLSM
EIGRP - OSPF - RIP
Every 10 Seconds
Only with Cisco IOS software release 12.3 (2) T
Maximizing address efficiency - organization - summarization