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. What is ::
A combination of Link-state and distance vector
Private: link local
Unspecified
By DLCI's


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

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3. Rip is capable of load balancing over as many as?
To select the best path to the destination
By DLCI's
Six equal cost paths
Only topology within their respective area.


4. Summarization of network information usually occurs where?
Between areas?
It is never useful to send information about a route back in the direction from which the original info came.
Convergence
Checks the source address and then permits or denies the entire protocol suite


5. What are two OSPF authentication methods?
Plaintext and MD5
The Root bridge is the bridge with the lowest bridge ID
IETF
Between areas?


6. Describe an Outbound ACL
Every 5 seconds
Cisco - ANSI - Q.933A
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
90


7. What algorithm does EIGRP use?
A link is an interface on a router
0
The Diffusing Update Algorithm (DUAL)
Dijkstra's Algorithm


8. Why is this done?
Every 10 Seconds
Multicast
To reduce OSPF traffic
Every 30 Seconds


9. Can you delete individual entries in a specific ACL?
RIPv2 and EIGRP
Only with Cisco IOS software release 12.3 (2) T
110
Connects the different areas


10. What type of algorithm does RIP use?
Distance Vector
Dijkstra's Algorithm
4
All backup routes for destinations.


11. An autonomous system could also be referred to as what?
TRUE
4
Anycast
Domain


12. What is an ABR
Because a loopback interface is always active and cannot be in a down state like a real interface can.
For line vty 0 4
To select the best path to the destination
Area Border Router


13. Admin distance of OSPF?
Ever 2 seconds
Automatically
Disable auto summarization
110


14. What does a trunk do?

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15. What Layer does Frame Relay operate at?
Packets are processed before they are routed to an outbound interface.
Layers 1 & 2
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL


16. Can a Router exchange routing information if they are using different Routing Protocols?
No
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
RIPv2 & EIGRP
It is never useful to send information about a route back in the direction from which the original info came.


17. The AS number must what?
Match on all routers or it will not work
Plaintext and MD5
Aka Subnet mask
Different Autonomous Systems


18. What is the purpose of LMI
It is the signaling standard that maintains connection and statues between the DCE and DTE
Propagation of partial updates that are sent only to those routers that the changes affect.
10Mb/s
Anycast


19. Why is EIGRP considered a Hybrid routing protocol?
Layers 1 & 2
10Mb/s
It combines the advantages of Link-State and Distance vector routing protocols.
...


20. Spanning-Tree cost of 100
10Mb/s
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Inter-VLAN routing


21. In regards to troubleshooting OSPF what should you check?
A group of end stations with a common set of requirements - independent of their physical location
Advance Distance Vector
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Every 5 seconds


22. What three types of IPv6 address types are there?
Different Autonomous Systems
Cisco - ANSI - Q.933A
Domain
Unicast - Multicast - Anycast


23. How long is the dead interval
110
Forces protocols to behave as if they were classless
4 times the hello interval
Ever 2 seconds


24. Example of a Routed Protocol?
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Telnet connectivity - authentication and extended ACLs
IP
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


25. Formula for determining Subnets
2^n
Scalable and fast convergence
The lower MAC address
The inverse of a subnet mask.


26. How many hops are allowed with RIP?
15.....16 hops and the interface is down
Port based
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Carry's traffic for multiple VLANS


27. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
16
A permit statement
It is never useful to send information about a route back in the direction from which the original info came.
RIPv2 and EIGRP


28. What do you need to do if there are discontigous networks with EIGRP?
4
To select the best path to the destination
Advance Distance Vector
Disable auto summarization


29. What are the three LMI standards
Unicast - Multicast - Anycast
Multiple virtual interfaces that are associated with one physical interface
A backbone area...Also known as Area 0
Cisco - ANSI - Q.933A


30. Benefits of OSPF?
1
The update only includes info about the route change
Scalable and fast convergence
Anycast


31. Problem with RIP
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Susceptible to routing loops
...
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


32. Describe features of RIPv1
Reduce the link-state database and routing table
Ever 2 seconds
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Every 10 seconds


33. What is one to many?
TRUE
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Multicast
Ever 2 seconds


34. How does an Extended ACL work?
Not scalable - hard to maintain as the network grows
Checks the source and destination address then permits or denies specific protocols
The inverse of a subnet mask.
Cisco - ANSI - Q.933A


35. Break down the word Link-State

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36. Explain OSPF

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37. Problem with static routes
2^n-2
Convergence
Not scalable - hard to maintain as the network grows
To reduce OSPF traffic


38. What does DLCI stand for?
Data Link Connection Identifier
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Bandwidth & Delay
No


39. What two things need to be done to enable dynamic routing?
120
Select the routing protocol - then specify the network.
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
The inverse of a subnet mask.


40. Formula for determining hosts
MAC based
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
2^n-2
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.


41. What do area's do?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Data Link Connection Identifier
Reduce the link-state database and routing table
Associating the network address with a local DLCI.


42. What are the major components of OSPF troubleshooting?
Multiple virtual interfaces that are associated with one physical interface
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Anycast
Because a loopback interface is always active and cannot be in a down state like a real interface can.


43. How often does EIGRP send hellow packets?
All backup routes for destinations.
Every 5 seconds
Aka Subnet mask
110


44. Admin distance of a Static Route?
Every 30 Seconds
Checks the source and destination address then permits or denies specific protocols
1
Propagation of partial updates that are sent only to those routers that the changes affect.


45. How do you configure a sub interface?
Checks the source and destination address then permits or denies specific protocols
Private: link local
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 a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.


46. What distant vector protocols exhibit classless behavior?
RIPv2 and EIGRP
The lower MAC address
A backbone area...Also known as Area 0
Multiple virtual interfaces that are associated with one physical interface


47. What two classless protocols act classful by default?
RIPv2 & EIGRP
32768
The Diffusing Update Algorithm (DUAL)
Determines the cost which is the bandwidth


48. How does a Standard ACL work?
4
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Supports both unequal metric load balancing and equal metric balancing.
Checks the source address and then permits or denies the entire protocol suite


49. What is Frame Relay?
Autonomous System
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Every 5 seconds
MAC based


50. VTP Server Mode does what?

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