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. Nonbackbone - internal routers are aware of what topology
1
Only topology within their respective area.
Anycast
It combines the advantages of Link-State and Distance vector routing protocols.


2. How is the root bridge determined?
A combination of Link-state and distance vector
A layer 3 switch or router
Match on all routers or it will not work
The Root bridge is the bridge with the lowest bridge ID


3. Can a Router exchange routing information if they are using different Routing Protocols?
Select the routing protocol - then specify the network.
Individual or group IP's
No
Connects the different areas


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

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5. What is one to many?
Scalable and fast convergence
Multicast
Layers 1 & 2
It combines the advantages of Link-State and Distance vector routing protocols.


6. Explain OSPF

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7. Dynamic ACL's are dependent on what?
Telnet connectivity - authentication and extended ACLs
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Private: link local
The update only includes info about the route change


8. Example of a Routed Protocol?
16
IP
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Because a loopback interface is always active and cannot be in a down state like a real interface can.


9. What is the multicast address for EIGRP?
Each router builds a map of the network and determines the shortest path to every network.
Plaintext and MD5
20 seconds: 10 missed BPDU's
224.0.0.10


10. Why is EIGRP considered a Hybrid routing protocol?
It combines the advantages of Link-State and Distance vector routing protocols.
Every 10 seconds
...
Disable auto summarization


11. What two things need to be done to enable dynamic routing?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
RIPv2 & EIGRP
110
Select the routing protocol - then specify the network.


12. Summarization of network information usually occurs where?
Between areas?
To select the best path to the destination
Supports both unequal metric load balancing and equal metric balancing.
16


13. How often does a router send link-state advertisements?
By DLCI's
Every 30 minutes by default
Distance Vector
A trunk


14. What is ::
Unspecified
TRUE
Packets are processed before they are routed to an outbound interface.
IP


15. How do you configure a sub interface?
Scalable and fast 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
To select the best path to the destination
Distance Vector


16. What is passing VLAN traffic to another called?
120
Unspecified
Inter-VLAN routing
90


17. An OSPF neighbor relationship can also be called what?
A backbone area...Also known as Area 0
Adjacency
15.....16 hops and the interface is down
Every 10 Seconds


18. A router running EIGRP will store what?
A permit statement
All backup routes for destinations.
Maximizing address efficiency - organization - summarization
Layers 1 & 2


19. What does the back bone router do?
Connects the different areas
Plaintext and MD5
Layers 1 & 2
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


20. What are the major components of OSPF troubleshooting?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Plaintext and MD5
Null
4


21. How does an outbound ACL work?
Routes First/ Tests second
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Plaintext and MD5
Select the routing protocol - then specify the network.


22. With OSPF - there must always be a area......
For line vty 0 4
To reduce OSPF traffic
0
Susceptible to routing loops


23. Can you delete individual entries in a specific ACL?
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
MD5 and you have to enable it if you want to use it.
224.0.0.10
Only with Cisco IOS software release 12.3 (2) T


24. How does inbound ACL work?
Loopback
Test Firsts/ Routes Second
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
1.) Enter the Routing Manually 2.) Use Dymamic Routing


25. Example of a Routing Protocol?
4
Checks the source address and then permits or denies the entire protocol suite
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.
EIGRP - OSPF - RIP


26. What three types of IPv6 address types are there?
Disable auto summarization
Unicast - Multicast - Anycast
EIGRP - OSPF - RIP
0


27. VTP Client Mode does what?

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28. What is the spilt horizon rule?
It is never useful to send information about a route back in the direction from which the original info came.
...
Maximizing address efficiency - organization - summarization
Each router builds a map of the network and determines the shortest path to every network.


29. In frame relay What is Inverse Arp
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Select the routing protocol - then specify the network.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Associating the network address with a local DLCI.


30. Every ACL will need what?
0
DROTHER
Checks the source and destination address then permits or denies specific protocols
A permit statement


31. What do you need to do if there are discontigous networks with EIGRP?
Determines the cost which is the bandwidth
Disable auto summarization
By DLCI's
MAC based


32. What is ::1
TRUE
The lower MAC address
Loopback
Select the routing protocol - then specify the network.


33. Break down the word Link-State

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34. What is the dead interval
A combination of Link-state and distance vector
Aka Subnet mask
To select the best path to the destination
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.


35. How often are LMI's sent out?
No
Every 10 Seconds
2^n-2
Only with Cisco IOS software release 12.3 (2) T


36. Describe a Inbound ACL
Packets are processed before they are routed to an outbound interface.
TRUE
No
0


37. How many hops are allowed with RIP?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
15.....16 hops and the interface is down
Private: link local


38. Rip is capable of load balancing over as many as?
Six equal cost paths
Every 30 minutes by default
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
110


39. What Layer does Frame Relay operate at?
Telnet connectivity - authentication and extended ACLs
Checks the source address and then permits or denies the entire protocol suite
Layers 1 & 2
It is never useful to send information about a route back in the direction from which the original info came.


40. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
TRUE
10Mb/s
...
20 seconds: 10 missed BPDU's


41. In regards to ACL's What are the three protocols?
2^n-2
TRUE
Null
One ACL per protocol - One ACL per direction - Once ACL per interface


42. Why is this done?
It is never useful to send information about a route back in the direction from which the original info came.
Checks the source address and then permits or denies the entire protocol suite
Port based
To reduce OSPF traffic


43. What algorithm does EIGRP use?
2^n
No
Checks the source and destination address then permits or denies specific protocols
The Diffusing Update Algorithm (DUAL)


44. OSPF routes packets within a single?
20 seconds: 10 missed BPDU's
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Autonomous System
Layers 1 & 2


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

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46. Formula for determining Subnets
2^n
Advertised Distance & Feasible distance
Scalable and fast convergence
All backup routes for destinations.


47. Classful Protocols summarize
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
MAC based
Automatically
Advance Distance Vector


48. What are non designated routers called?
DROTHER
4
Null
Only topology within their respective area.


49. Spanning-Tree coast of 4
Bandwidth & Delay
30-50 seconds
Reduce the link-state database and routing table
1Gb/s


50. How are Frame Relay Circuits identified?

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