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 type of algorithm does EIGRP use?
Advance Distance Vector
Connects the different areas
32768
Area Border Router


2. How often does a router send link-state advertisements?
RIPv2 and EIGRP
Susceptible to routing loops
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Every 30 minutes by default


3. 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
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Individual or group IP's
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available


4. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
The Root bridge is the bridge with the lowest bridge ID
...
Checks the source address and then permits or denies the entire protocol suite
16


5. Routers are used for what?
It is never useful to send information about a route back in the direction from which the original info came.
Routes First/ Tests second
Between areas?
To select the best path to the destination


6. Explain how routing loops occur with RIP?
2^n-2
Connects the different areas
...
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers


7. What is a VLAN
Connects the different areas
Checks the source address and then permits or denies the entire protocol suite
A group of end stations with a common set of requirements - independent of their physical location
Autonomous System


8. Spanning-Tree cost of 19
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
100Mb/s
TRUE
Only with Cisco IOS software release 12.3 (2) T


9. When do you use Access-Class
It is never useful to send information about a route back in the direction from which the original info came.
0
For line vty 0 4
Disable auto summarization


10. Admin distance of a Static Route?
1Gb/s
Area Border Router
Telnet connectivity - authentication and extended ACLs
1


11. Advance Distance Vector or Hybrid uses what?
224.0.0.5
A combination of Link-state and distance vector
Anycast
The inverse of a subnet mask.


12. VTP Client Mode does what?

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13. VTP Transparent Mode does what?

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14. What do you need to do if there are discontigous networks with EIGRP?
MD5 and you have to enable it if you want to use it.
Test Firsts/ Routes Second
Disable auto summarization
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.


15. What type of authentication does EIGRP use?
Disable auto summarization
MD5 and you have to enable it if you want to use it.
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.
Every 5 seconds


16. VTP Server Mode does what?

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17. How does Link-State work?
2^n
Unicast - Multicast - Anycast
IETF
Each router builds a map of the network and determines the shortest path to every network.


18. What is prefix length?
Aka Subnet mask
Null
Anycast
0


19. Example of a Routed Protocol?
A link is an interface on a router
Different Autonomous Systems
Test Firsts/ Routes Second
IP


20. What is the purpose of LMI
Ever 2 seconds
2^n
Carry's traffic for multiple VLANS
It is the signaling standard that maintains connection and statues between the DCE and DTE


21. What two things need to be done to enable dynamic routing?
Different Autonomous Systems
A permit statement
Select the routing protocol - then specify the network.
The Diffusing Update Algorithm (DUAL)


22. What are the major components of OSPF troubleshooting?
Every 5 seconds
Layers 1 & 2
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.


23. How does an outbound ACL work?
Reduce the link-state database and routing table
15.....16 hops and the interface is down
Routes First/ Tests second
20 seconds: 10 missed BPDU's


24. What Layer does Frame Relay operate at?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Routes First/ Tests second
10Mb/s
Layers 1 & 2


25. Routing protocol is what?
Data Link Connection Identifier
Null
Every 30 Seconds
A protocol on how to communicate with other routers


26. Exterior Gateway Protocols are designed for use between
A permit statement
Connects the different areas
Different Autonomous Systems
Plaintext and MD5


27. Can a Router exchange routing information if they are using different Routing Protocols?
Every 10 seconds
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
No
Every 10 Seconds


28. What is OSPF multicast address?
Every 30 Seconds
224.0.0.5
4
Automatically


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

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30. With OSPF - what must be defined?
A backbone area...Also known as Area 0
A group of end stations with a common set of requirements - independent of their physical location
Loopback
Plaintext and MD5


31. How long is the dead interval
224.0.0.5
One ACL per protocol - One ACL per direction - Once ACL per interface
Maximizing address efficiency - organization - summarization
4 times the hello interval


32. Describe a Inbound ACL
Every 10 Seconds
Packets are processed before they are routed to an outbound interface.
Designated Router (DR) and a Back-up designated Router (BDR)
Routes First/ Tests second


33. How often are BPDU's sent?
TRUE
Ever 2 seconds
Advertised Distance & Feasible distance
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.


34. What does bounded refer to?
MD5 and you have to enable it if you want to use it.
Propagation of partial updates that are sent only to those routers that the changes affect.
0
Supports both unequal metric load balancing and equal metric balancing.


35. An autonomous system could also be referred to as what?
DROTHER
15.....16 hops and the interface is down
Private: link local
Domain


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

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37. How do you apply the ACL to an interface
Every 5 seconds
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Area Border Router
Unicast - Multicast - Anycast


38. Formula for determining hosts
20 seconds: 10 missed BPDU's
224.0.0.10
2^n-2
Loopback


39. Dynamic ACL's are dependent on what?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
4
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.
Telnet connectivity - authentication and extended ACLs


40. Can you delete individual entries in a specific ACL?
Updates all DROTHER Routers when a change occurs
Only with Cisco IOS software release 12.3 (2) T
Layers 1 & 2
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


41. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
The lower MAC address
Every 30 minutes by default


42. The time delay for a router to match a network change?
MD5 and you have to enable it if you want to use it.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
The update only includes info about the route change
Convergence


43. Admin distance of EIGRP?
90
The Root bridge is the bridge with the lowest bridge ID
Advance Distance Vector
Domain


44. In Link state terminology - What is a link?
Maximizing address efficiency - organization - summarization
4 times the hello interval
A link is an interface on a router
30-50 seconds


45. Why is EIGRP considered a Hybrid routing protocol?
It combines the advantages of Link-State and Distance vector routing protocols.
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Link-State
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers


46. What are subinterfaces?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Multiple virtual interfaces that are associated with one physical interface
A link is an interface on a router
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.


47. What is the multicast address for EIGRP?
Area Border Router
4
224.0.0.10
Packet Header


48. Admin distance of a connected Network?
Private: link local
0
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.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.


49. What do area's do?
Different Autonomous Systems
Disable auto summarization
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Reduce the link-state database and routing table


50. How do you configure a sub interface?
Every 5 seconds
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
Private: link local
1.) Enter the Routing Manually 2.) Use Dymamic Routing