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. OSPF routes packets within a single?
Select the routing protocol - then specify the network.
4
Autonomous System
MAC based


2. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
TRUE
Reduce the link-state database and routing table
Because a loopback interface is always active and cannot be in a down state like a real interface can.
EIGRP - OSPF - RIP


3. What is the spilt horizon rule?
All backup routes for destinations.
224.0.0.5
It is never useful to send information about a route back in the direction from which the original info came.
Because a loopback interface is always active and cannot be in a down state like a real interface can.


4. An autonomous system could also be referred to as what?
Domain
Anycast
Advance Distance Vector
Every 10 Seconds


5. Can a Router exchange routing information if they are using different Routing Protocols?
No
To select the best path to the destination
110
0


6. What are non designated routers called?
DROTHER
Scalable and fast convergence
The lower MAC address
TRUE


7. What type of algorithm does RIP use?
Every 5 seconds
0
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Distance Vector


8. What is a VLAN
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Checks the source and destination address then permits or denies specific protocols
A group of end stations with a common set of requirements - independent of their physical location


9. For a VLAN to span across multiple switches What is required?
1
Telnet connectivity - authentication and extended ACLs
A trunk
110


10. The no auto-summary command does what?
16
Forces protocols to behave as if they were classless
EIGRP - OSPF - RIP
Different Autonomous Systems


11. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
All backup routes for destinations.
TRUE
Domain
View


12. In regards to troubleshooting OSPF what should you check?
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Layers 1 & 2
A combination of Link-state and distance vector
The inverse of a subnet mask.


13. What is Frame Relay?
Bandwidth & Delay
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Autonomous System
Routes First/ Tests second


14. How long is the dead interval
1.) Enter the Routing Manually 2.) Use Dymamic Routing
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
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
4 times the hello interval


15. What is the default for equal cost paths for load balancing with OSPF?
0
32768
Designated Router (DR) and a Back-up designated Router (BDR)
4


16. What is prefix length?
Aka Subnet mask
Only topology within their respective area.
A trunk
224.0.0.5


17. How often are periodic updates sent out via RIP
EIGRP - OSPF - RIP
120
RIPv2 & EIGRP
Every 30 Seconds


18. Admin distance of OSPF?
A group of end stations with a common set of requirements - independent of their physical location
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
A backbone area...Also known as Area 0
110


19. What Layer does Frame Relay operate at?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Plaintext and MD5
Layers 1 & 2
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


20. How are Frame Relay Circuits identified?

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21. How does EIGRP work with regards to Load Balancing
A link is an interface on a router
View
Different Autonomous Systems
Supports both unequal metric load balancing and equal metric balancing.


22. VTP Server Mode does what?

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23. How does a Standard ACL work?
Carry's traffic for multiple VLANS
Null
120
Checks the source address and then permits or denies the entire protocol suite


24. Problem with static routes
110
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Not scalable - hard to maintain as the network grows
Ever 2 seconds


25. What are the major components of OSPF troubleshooting?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
10Mb/s
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs


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

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27. What are subinterfaces?
Multiple virtual interfaces that are associated with one physical interface
Checks the source and destination address then permits or denies specific protocols
Individual or group IP's
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


28. How does an Extended ACL work?
A combination of Link-state and distance vector
Checks the source and destination address then permits or denies specific protocols
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
RIPv2 & EIGRP


29. What two parameters does EIGRP use to determine the best route?
Reduce the link-state database and routing table
224.0.0.10
MD5 and you have to enable it if you want to use it.
Advertised Distance & Feasible distance


30. What is the multicast address for EIGRP?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
224.0.0.10
Match on all routers or it will not work
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.


31. Admin distance of a Static Route?
Between areas?
Connects the different areas
100Mb/s
1


32. What do area's do?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Reduce the link-state database and routing table
120
2^n


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

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34. When do you use Access-Class
For line vty 0 4
Routes First/ Tests second
Domain
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL


35. What does a trunk do?

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36. What algorithm does EIGRP use?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Each router builds a map of the network and determines the shortest path to every network.
Data Link Connection Identifier
The Diffusing Update Algorithm (DUAL)


37. How do you configure OSPF
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
Routes First/ Tests second
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0


38. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
The update only includes info about the route change
EIGRP - OSPF - RIP
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.
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


39. Rip is capable of load balancing over as many as?
Not scalable - hard to maintain as the network grows
Multiple virtual interfaces that are associated with one physical interface
It combines the advantages of Link-State and Distance vector routing protocols.
Six equal cost paths


40. Example of a Routing Protocol?
A link is an interface on a router
Not scalable - hard to maintain as the network grows
EIGRP - OSPF - RIP
Forces protocols to behave as if they were classless


41. Nonbackbone - internal routers are aware of what topology
Only topology within their respective area.
Aka Subnet mask
Layers 1 & 2
Updates all DROTHER Routers when a change occurs


42. Routing protocol is what?
Data Link Connection Identifier
It is the signaling standard that maintains connection and statues between the DCE and DTE
A protocol on how to communicate with other routers
Designated Router (DR) and a Back-up designated Router (BDR)


43. How many hops are allowed with RIP?
Scalable and fast convergence
Convergence
15.....16 hops and the interface is down
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication


44. What is the default load balancing for RIP
Susceptible to routing loops
A permit statement
4
A layer 3 switch or router


45. Benefits of OSPF?
20 seconds: 10 missed BPDU's
Scalable and fast convergence
A layer 3 switch or router
Supports both unequal metric load balancing and equal metric balancing.


46. What does EIGRP use to calculate it's metric?
Bandwidth & Delay
Unspecified
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
It is the signaling standard that maintains connection and statues between the DCE and DTE


47. How do you apply the ACL to an interface
EIGRP - OSPF - RIP
A group of end stations with a common set of requirements - independent of their physical location
Each router builds a map of the network and determines the shortest path to every network.
Make sure you are in interface mode - then use this command ip access-group 1 out/in


48. What is needed to pass traffic from one VLAN to another?
Multiple virtual interfaces that are associated with one physical interface
A layer 3 switch or router
Automatically
Make sure you are in interface mode - then use this command ip access-group 1 out/in


49. In Link state terminology - What is a link?
2^n-2
A link is an interface on a router
224.0.0.5
Autonomous System


50. What three types of IPv6 address types are there?
It is never useful to send information about a route back in the direction from which the original info came.
Ever 2 seconds
20 seconds: 10 missed BPDU's
Unicast - Multicast - Anycast