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. Routers are used for what?
To select the best path to the destination
Inter-VLAN routing
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Individual or group IP's


2. When do you use Access-Class
Every 10 seconds
For line vty 0 4
Routes First/ Tests second
2^n-2


3. What distant vector protocols exhibit classless behavior?
Dijkstra's Algorithm
Select the routing protocol - then specify the network.
RIPv2 and EIGRP
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.


4. How does EIGRP work with regards to Load Balancing
20 seconds: 10 missed BPDU's
16
Telnet connectivity - authentication and extended ACLs
Supports both unequal metric load balancing and equal metric balancing.


5. How does the SPF determine the shortest path?
Multiple virtual interfaces that are associated with one physical interface
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Determines the cost which is the bandwidth
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs


6. What are the two ways routers can learn about the destination information?
Bandwidth & Delay
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Link-State
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


7. How is an EUI-64 format interface ID created from a 48-Bit MAC address
Dijkstra's Algorithm
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
A protocol on how to communicate with other routers
Reduce the link-state database and routing table


8. What is one to nearest
Anycast
Each router builds a map of the network and determines the shortest path to every network.
Packet Header
Every 5 seconds


9. What three types of IPv6 address types are there?
Unicast - Multicast - Anycast
Port based
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
DROTHER


10. Admin distance of RIPv2
Convergence
120
Propagation of partial updates that are sent only to those routers that the changes affect.
Unspecified


11. How do you apply the ACL to an interface
Unicast - Multicast - Anycast
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Link-State


12. For a VLAN to span across multiple switches What is required?
A trunk
Anycast
It combines the advantages of Link-State and Distance vector routing protocols.
Every 5 seconds


13. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Determines the cost which is the bandwidth
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.
Autonomous System
RIPv2 and EIGRP


14. Exterior Gateway Protocols are designed for use between
It is never useful to send information about a route back in the direction from which the original info came.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Different Autonomous Systems
Susceptible to routing loops


15. Problem with static routes
The Diffusing Update Algorithm (DUAL)
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.
Determines the cost which is the bandwidth
Not scalable - hard to maintain as the network grows


16. What is one to many?
View
Multicast
30-50 seconds
Unicast - Multicast - Anycast


17. What is the multicast address for EIGRP?
By DLCI's
A layer 3 switch or router
224.0.0.10
Advance Distance Vector


18. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
A layer 3 switch or router
The lower MAC address
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Associating the network address with a local DLCI.


19. Who designed OSPF?
The lower MAC address
10Mb/s
IETF
0


20. What type of authentication does EIGRP use?
MD5 and you have to enable it if you want to use it.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
The update only includes info about the route change
No


21. 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.
Every 10 seconds
Domain
Distance Vector


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

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23. Purpose of a Routing Protocol?
Only with Cisco IOS software release 12.3 (2) T
Anycast
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
The lower MAC address


24. What is an ABR
Area Border Router
1
Domain
Layers 1 & 2


25. With OSPF - what must be defined?
Routes First/ Tests second
A backbone area...Also known as Area 0
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Every 30 minutes by default


26. How does an outbound ACL work?
0
One ACL per protocol - One ACL per direction - Once ACL per interface
Routes First/ Tests second
Because a loopback interface is always active and cannot be in a down state like a real interface can.


27. What are non designated routers called?
Between areas?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
DROTHER
Layers 1 & 2


28. What do area's do?
Ever 2 seconds
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
The update only includes info about the route change
Reduce the link-state database and routing table


29. Can a Router exchange routing information if they are using different Routing Protocols?
Match on all routers or it will not work
Inter-VLAN routing
Automatically
No


30. How does a Standard ACL work?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Checks the source address and then permits or denies the entire protocol suite
All backup routes for destinations.
Six equal cost paths


31. What two things need to be done to enable dynamic routing?
IP
Each router builds a map of the network and determines the shortest path to every network.
RIPv2 and EIGRP
Select the routing protocol - then specify the network.


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

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33. Nonbackbone - internal routers are aware of what topology
By DLCI's
A trunk
Dijkstra's Algorithm
Only topology within their respective area.


34. How often are BPDU's sent?
MAC based
Packets are processed before they are routed to an outbound interface.
Ever 2 seconds
Port based


35. The AS number must what?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
EIGRP - OSPF - RIP
Match on all routers or it will not work
4 times the hello interval


36. Break down the word Link-State

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37. VTP Server Mode does what?

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38. In frame relay What is Inverse Arp
Connects the different areas
TRUE
Associating the network address with a local DLCI.
A backbone area...Also known as Area 0


39. Describe features of RIPv2
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Unspecified
Supports both unequal metric load balancing and equal metric balancing.
224.0.0.10


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

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41. Why is EIGRP considered a Hybrid routing protocol?
30-50 seconds
It is the signaling standard that maintains connection and statues between the DCE and DTE
It combines the advantages of Link-State and Distance vector routing protocols.
Distance Vector


42. How often does EIGRP send hellow packets?
Every 5 seconds
Propagation of partial updates that are sent only to those routers that the changes affect.
By DLCI's
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication


43. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
For line vty 0 4
Test Firsts/ Routes Second
TRUE
Select the routing protocol - then specify the network.


44. In Link state terminology - What is a link?
DROTHER
Null
Cisco - ANSI - Q.933A
A link is an interface on a router


45. For an adjacency to occur what do the routers have to agree on?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Associating the network address with a local DLCI.
120
10Mb/s


46. Can you delete individual entries in a specific ACL?
Only with Cisco IOS software release 12.3 (2) T
Select the routing protocol - then specify the network.
Each router builds a map of the network and determines the shortest path to every network.
16


47. What address is FE80:/10
By DLCI's
Private: link local
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Make sure you are in interface mode - then use this command ip access-group 1 out/in


48. Describe features of RIPv1
Updates all DROTHER Routers when a change occurs
1
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.


49. Admin distance of a Static Route?
To select the best path to the destination
1Gb/s
EIGRP - OSPF - RIP
1


50. In regards to ACL's What are the three protocols?
One ACL per protocol - One ACL per direction - Once ACL per interface
For line vty 0 4
Aka Subnet mask
Convergence