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 two things need to be done to enable dynamic routing?
Multiple virtual interfaces that are associated with one physical interface
Select the routing protocol - then specify the network.
Different Autonomous Systems
Link-State


2. What is ::
Ever 2 seconds
Unspecified
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
A group of end stations with a common set of requirements - independent of their physical location


3. What are subinterfaces?
1
Multiple virtual interfaces that are associated with one physical interface
Maximizing address efficiency - organization - summarization
Distance Vector


4. How often does a router send link-state advertisements?
0
For line vty 0 4
Updates all DROTHER Routers when a change occurs
Every 30 minutes by default


5. What are the two ways routers can learn about the destination information?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Link-State
Anycast
4 times the hello interval


6. Problem with RIP
Susceptible to routing loops
0
Six equal cost paths
Test Firsts/ Routes Second


7. Summarization of network information usually occurs where?
Between areas?
A permit statement
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Maximizing address efficiency - organization - summarization


8. How long is the dead interval
A combination of Link-state and distance vector
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
4 times the hello interval
Different Autonomous Systems


9. Wildcard masks filter

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10. Why is EIGRP considered a Hybrid routing protocol?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
It combines the advantages of Link-State and Distance vector routing protocols.
Advertised Distance & Feasible distance
A trunk


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

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12. What is the default for equal cost paths for load balancing with OSPF?
Autonomous System
4
Layers 1 & 2
Designated Router (DR) and a Back-up designated Router (BDR)


13. VTP Client Mode does what?

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14. Why is it important to have a loopback address when using OSPF?
To reduce OSPF traffic
The Diffusing Update Algorithm (DUAL)
A layer 3 switch or router
Because a loopback interface is always active and cannot be in a down state like a real interface can.


15. How often are periodic updates sent out via RIP
DROTHER
Every 30 Seconds
The lower MAC address
A trunk


16. An autonomous system could also be referred to as what?
4
Domain
Anycast
Dijkstra's Algorithm


17. What type of authentication does EIGRP use?
Susceptible to routing loops
Propagation of partial updates that are sent only to those routers that the changes affect.
MD5 and you have to enable it if you want to use it.
One ACL per protocol - One ACL per direction - Once ACL per interface


18. Rip is capable of load balancing over as many as?
Link-State
The update only includes info about the route change
Six equal cost paths
10Mb/s


19. Can a Router exchange routing information if they are using different Routing Protocols?
No
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Maximizing address efficiency - organization - summarization
The Diffusing Update Algorithm (DUAL)


20. How do you configure OSPF
MD5 and you have to enable it if you want to use it.
Port based
Every 30 minutes by default
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0


21. How does an outbound ACL work?
Telnet connectivity - authentication and extended ACLs
For line vty 0 4
30-50 seconds
Routes First/ Tests second


22. What does the DR do?
Updates all DROTHER Routers when a change occurs
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Routes First/ Tests second
If int status is UP/UP..Check to make sure OSPF is enabled on the interface


23. Example of a Routing Protocol?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
...
EIGRP - OSPF - RIP
...


24. By default OSPF uses what type of authentication?
A group of end stations with a common set of requirements - independent of their physical location
Private: link local
All backup routes for destinations.
Null


25. What is the purpose of LMI
Only topology within their respective area.
It is the signaling standard that maintains connection and statues between the DCE and DTE
Domain
Determines the cost which is the bandwidth


26. The advantages of VLSM
Maximizing address efficiency - organization - summarization
EIGRP - OSPF - RIP
4
Different Autonomous Systems


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

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28. Admin distance of a Static Route?
MD5 and you have to enable it if you want to use it.
1
Match on all routers or it will not work
224.0.0.10


29. Describe an Outbound ACL
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
2^n-2
2^n
Maximizing address efficiency - organization - summarization


30. What type of algorithm does EIGRP use?
Advance Distance Vector
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Only topology within their respective area.
A link is an interface on a router


31. Formula for determining hosts
Each router builds a map of the network and determines the shortest path to every network.
2^n-2
RIPv2 and EIGRP
1.) Enter the Routing Manually 2.) Use Dymamic Routing


32. OSPF will elect a what?
RIPv2 & EIGRP
MAC based
Designated Router (DR) and a Back-up designated Router (BDR)
Multiple virtual interfaces that are associated with one physical interface


33. What two classless protocols act classful by default?
RIPv2 & EIGRP
Unicast - Multicast - Anycast
Advance Distance Vector
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.


34. What is the multicast address for EIGRP?
224.0.0.10
30-50 seconds
Cisco - ANSI - Q.933A
Forces protocols to behave as if they were classless


35. What is prefix length?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Aka Subnet mask
Supports both unequal metric load balancing and equal metric balancing.
A backbone area...Also known as Area 0


36. What is Frame Relay?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Only with Cisco IOS software release 12.3 (2) T


37. In regards to troubleshooting OSPF what should you check?
224.0.0.10
110
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Null


38. The AS number must what?
...
Unicast - Multicast - Anycast
Match on all routers or it will not work
4


39. An OSPF neighbor relationship can also be called what?
Between areas?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Adjacency
Loopback


40. What is one to many?
Layers 1 & 2
16
Designated Router (DR) and a Back-up designated Router (BDR)
Multicast


41. Nonbackbone - internal routers are aware of what topology
Every 30 Seconds
Distance Vector
Area Border Router
Only topology within their respective area.


42. How is the root bridge determined?
To reduce OSPF traffic
Because a loopback interface is always active and cannot be in a down state like a real interface can.
The Root bridge is the bridge with the lowest bridge ID
Dijkstra's Algorithm


43. How does inbound ACL work?
Test Firsts/ Routes Second
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
30-50 seconds
Telnet connectivity - authentication and extended ACLs


44. VTP Transparent Mode does what?

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45. VTP Server Mode does what?

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46. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
Unspecified
Only with Cisco IOS software release 12.3 (2) T
Ever 2 seconds


47. 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
Private: link local
The lower MAC address
Reduce the link-state database and routing table


48. Describe features of RIPv1
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
RIPv2 & EIGRP
224.0.0.5
Checks the source address and then permits or denies the entire protocol suite


49. What is needed to pass traffic from one VLAN to another?
1Gb/s
...
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
A layer 3 switch or router


50. Normal time for STP convergence
15.....16 hops and the interface is down
Distance Vector
30-50 seconds
100Mb/s