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. Benefits of OSPF?
Scalable and fast convergence
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
For line vty 0 4
Different Autonomous Systems


2. What is the default Bridge priority?
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.
32768
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Unspecified


3. Classful Protocols summarize
110
Automatically
Not scalable - hard to maintain as the network grows
Checks the source address and then permits or denies the entire protocol suite


4. Explain OSPF

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5. How does EIGRP work with regards to Load Balancing
0
Every 5 seconds
Supports both unequal metric load balancing and equal metric balancing.
Match on all routers or it will not work


6. How does inbound ACL work?
Test Firsts/ Routes Second
Only with Cisco IOS software release 12.3 (2) T
Plaintext and MD5
A backbone area...Also known as Area 0


7. How does an Extended ACL work?
Dijkstra's Algorithm
RIPv2 and EIGRP
It is the signaling standard that maintains connection and statues between the DCE and DTE
Checks the source and destination address then permits or denies specific protocols


8. What is OSPF multicast address?
Layers 1 & 2
One ACL per protocol - One ACL per direction - Once ACL per interface
Every 30 Seconds
224.0.0.5


9. What are subinterfaces?
Forces protocols to behave as if they were classless
Distance Vector
Every 10 Seconds
Multiple virtual interfaces that are associated with one physical interface


10. What three types of IPv6 address types are there?
Unicast - Multicast - Anycast
Select the routing protocol - then specify the network.
0
Distance Vector


11. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Routes First/ Tests second
Every 5 seconds
32768
16


12. What does a trunk do?

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13. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
Reduce the link-state database and routing table
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Connects the different areas
The lower MAC address


14. An autonomous system could also be referred to as what?
Domain
Adjacency
RIPv2 and EIGRP
0


15. By default OSPF uses what type of authentication?
Forces protocols to behave as if they were classless
Packet Header
Ever 2 seconds
Null


16. 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.
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
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.
Connects the different areas


17. Exterior Gateway Protocols are designed for use between
Different Autonomous Systems
Automatically
Connects the different areas
RIPv2 and EIGRP


18. Spanning-Tree cost of 19
For line vty 0 4
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Multiple virtual interfaces that are associated with one physical interface
100Mb/s


19. Describe an Outbound ACL
1
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
View
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication


20. Example of a Routed Protocol?
Propagation of partial updates that are sent only to those routers that the changes affect.
Because a loopback interface is always active and cannot be in a down state like a real interface can.
IP
Maximizing address efficiency - organization - summarization


21. VTP Server Mode does what?

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22. What do area's do?
Reduce the link-state database and routing table
Telnet connectivity - authentication and extended ACLs
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication


23. A router running EIGRP will store what?
15.....16 hops and the interface is down
Six equal cost paths
All backup routes for destinations.
Packets are processed before they are routed to an outbound interface.


24. How are Frame Relay Circuits identified?

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25. Formula for determining hosts
Link-State
2^n-2
Data Link Connection Identifier
Convergence


26. Can a Router exchange routing information if they are using different Routing Protocols?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Adjacency
RIPv2 and EIGRP
No


27. How do you apply the ACL to an interface
Private: link local
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Convergence
A layer 3 switch or router


28. In Link state terminology - What is a link?
4
By DLCI's
A link is an interface on a router
Updates all DROTHER Routers when a change occurs


29. In frame relay What is Inverse Arp
110
Supports both unequal metric load balancing and equal metric balancing.
Associating the network address with a local DLCI.
The Root bridge is the bridge with the lowest bridge ID


30. How often does EIGRP send hellow packets?
Every 5 seconds
4
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


31. Summarization of network information usually occurs where?
Aka Subnet mask
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Between areas?
By DLCI's


32. How long is the dead interval
Every 30 minutes by default
4 times the hello interval
Link-State
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.


33. What two parameters does EIGRP use to determine the best route?
Advertised Distance & Feasible distance
30-50 seconds
Advance Distance Vector
Make sure you are in interface mode - then use this command ip access-group 1 out/in


34. In regards to ACL's What are the three protocols?
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Telnet connectivity - authentication and extended ACLs
One ACL per protocol - One ACL per direction - Once ACL per interface
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.


35. What does EIGRP use to calculate it's metric?
4
Different Autonomous Systems
Bandwidth & Delay
2^n-2


36. What is needed to pass traffic from one VLAN to another?
Only with Cisco IOS software release 12.3 (2) T
A layer 3 switch or router
110
Each router builds a map of the network and determines the shortest path to every network.


37. The AS number must what?
Match on all routers or it will not work
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Carry's traffic for multiple VLANS
Propagation of partial updates that are sent only to those routers that the changes affect.


38. What is the multicast address for EIGRP?
Scalable and fast convergence
224.0.0.10
The Diffusing Update Algorithm (DUAL)
The lower MAC address


39. OSPF routes packets within a single?
RIPv2 and EIGRP
Autonomous System
Every 30 Seconds
Port based


40. Problem with static routes
The inverse of a subnet mask.
Not scalable - hard to maintain as the network grows
A combination of Link-state and distance vector
For line vty 0 4


41. How do you configure a sub interface?
0
Test Firsts/ Routes Second
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 reduce OSPF traffic


42. How often are periodic updates sent out via RIP
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Area Border Router
Every 30 Seconds
The Diffusing Update Algorithm (DUAL)


43. Wildcard masks filter

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44. Dynamic VLAN is what?
2^n-2
MAC based
Domain
Disable auto summarization


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

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46. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
Plaintext and MD5
TRUE
Bandwidth & Delay
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.


47. What are non designated routers called?
It is never useful to send information about a route back in the direction from which the original info came.
DROTHER
The update only includes info about the route change
Between areas?


48. Nonbackbone - internal routers are aware of what topology
Only topology within their respective area.
MD5 and you have to enable it if you want to use it.
15.....16 hops and the interface is down
Disable auto summarization


49. Admin distance of a connected Network?
4 times the hello interval
IP
0
Adjacency


50. Spanning-Tree cost of 100
10Mb/s
The lower MAC address
Checks the source address and then permits or denies the entire protocol suite
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