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. Normal time for STP convergence
Area Border Router
Autonomous System
Checks the source address and then permits or denies the entire protocol suite
30-50 seconds


2. Can a Router exchange routing information if they are using different Routing Protocols?
Inter-VLAN routing
1Gb/s
Supports both unequal metric load balancing and equal metric balancing.
No


3. A router running EIGRP will store what?
Distance Vector
All backup routes for destinations.
Determines the cost which is the bandwidth
TRUE


4. For a VLAN to span across multiple switches What is required?
224.0.0.5
A protocol on how to communicate with other routers
The inverse of a subnet mask.
A trunk


5. How do you apply the ACL to an interface
Null
Make sure you are in interface mode - then use this command ip access-group 1 out/in
RIPv2 & EIGRP
4 times the hello interval


6. What are non designated routers called?
Packet Header
The Root bridge is the bridge with the lowest bridge ID
1Gb/s
DROTHER


7. VTP Server Mode does what?

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8. Classful Protocols summarize
4 times the hello interval
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Automatically
A link is an interface on a router


9. Spanning-Tree cost of 19
A combination of Link-state and distance vector
100Mb/s
Every 30 minutes by default
Maximizing address efficiency - organization - summarization


10. What type of algorithm does OSPF & IS-IS use?
0
Link-State
30-50 seconds
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication


11. Problem with RIP
Select the routing protocol - then specify the network.
The Root bridge is the bridge with the lowest bridge ID
Susceptible to routing loops
The update only includes info about the route change


12. How do you configure a sub interface?
Only topology within their respective area.
15.....16 hops and the interface is down
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
Every 30 minutes by default


13. Who designed OSPF?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
It is never useful to send information about a route back in the direction from which the original info came.
MD5 and you have to enable it if you want to use it.
IETF


14. What does the back bone router do?
Unspecified
Connects the different areas
It is never useful to send information about a route back in the direction from which the original info came.
Telnet connectivity - authentication and extended ACLs


15. How does inbound ACL work?
16
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Test Firsts/ Routes Second
Only topology within their respective area.


16. Advance Distance Vector or Hybrid uses what?
A combination of Link-state and distance vector
Disable auto summarization
Domain
Individual or group IP's


17. What does partial refer to?
Dijkstra's Algorithm
The update only includes info about the route change
A permit statement
Select the routing protocol - then specify the network.


18. With OSPF - there must always be a area......
Unicast - Multicast - Anycast
Designated Router (DR) and a Back-up designated Router (BDR)
View
0


19. What is the Wildcard mask
Match on all routers or it will not work
Data Link Connection Identifier
The inverse of a subnet mask.
Dijkstra's Algorithm


20. How often does EIGRP send hellow packets?
Every 5 seconds
Susceptible to routing loops
1Gb/s
Disable auto summarization


21. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Unicast - Multicast - Anycast
1Gb/s
View
Aka Subnet mask


22. Dynamic VLAN is what?
Packet Header
Individual or group IP's
MAC based
Disable auto summarization


23. What is ::1
All backup routes for destinations.
TRUE
Loopback
Only with Cisco IOS software release 12.3 (2) T


24. Explain OSPF

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25. Spanning-Tree cost of 100
1
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
10Mb/s
The Diffusing Update Algorithm (DUAL)


26. Break down the word Link-State

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27. Purpose of a Routing Protocol?
Between areas?
Carry's traffic for multiple VLANS
...
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available


28. What does the DR do?
2^n-2
Updates all DROTHER Routers when a change occurs
Test Firsts/ Routes Second
Checks the source and destination address then permits or denies specific protocols


29. How often are LMI's sent out?
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
For line vty 0 4
Every 30 Seconds
Every 10 Seconds


30. How does an outbound ACL work?
Routes First/ Tests second
Six equal cost paths
The inverse of a subnet mask.
A layer 3 switch or router


31. Static VLAN is what?
Port based
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
Checks the source and destination address then permits or denies specific protocols
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.


32. How often does a router send link-state advertisements?
Every 30 minutes by default
Routes First/ Tests second
Six equal cost paths
The Root bridge is the bridge with the lowest bridge ID


33. Why is it important to have a loopback address when using OSPF?
IETF
Carry's traffic for multiple VLANS
By DLCI's
Because a loopback interface is always active and cannot be in a down state like a real interface can.


34. What is an ABR
Area Border Router
EIGRP - OSPF - RIP
...
4


35. What are the three LMI standards
Every 30 Seconds
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Multiple virtual interfaces that are associated with one physical interface
Cisco - ANSI - Q.933A


36. What are two OSPF authentication methods?
Multicast
Domain
DROTHER
Plaintext and MD5


37. How many hops are allowed with RIP?
The Root bridge is the bridge with the lowest bridge ID
4
Carry's traffic for multiple VLANS
15.....16 hops and the interface is down


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

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39. What are the major components of OSPF troubleshooting?
A layer 3 switch or router
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Supports both unequal metric load balancing and equal metric balancing.
Area Border Router


40. What two classless protocols act classful by default?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
View
Every 10 seconds
RIPv2 & EIGRP


41. What are the two ways routers can learn about the destination information?
Checks the source and destination address then permits or denies specific protocols
...
Only topology within their respective area.
1.) Enter the Routing Manually 2.) Use Dymamic Routing


42. What does DLCI stand for?
It combines the advantages of Link-State and Distance vector routing protocols.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
For line vty 0 4
Data Link Connection Identifier


43. Example of a Routed Protocol?
Between areas?
Aka Subnet mask
Every 30 minutes by default
IP


44. For an adjacency to occur what do the routers have to agree on?
Convergence
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Scalable and fast convergence
Match on all routers or it will not work


45. The AS number must what?
Multicast
Packets are processed before they are routed to an outbound interface.
Match on all routers or it will not work
DROTHER


46. How are Frame Relay Circuits identified?

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47. When do you use Access-Class
224.0.0.10
For line vty 0 4
A trunk
Area Border Router


48. Admin distance of a connected Network?
Autonomous System
0
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
A backbone area...Also known as Area 0


49. By default OSPF uses what type of authentication?
Null
2^n-2
Individual or group IP's
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.


50. The no auto-summary command does what?
A protocol on how to communicate with other routers
Six equal cost paths
Cisco - ANSI - Q.933A
Forces protocols to behave as if they were classless