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. Problem with static routes
It is never useful to send information about a route back in the direction from which the original info came.
Not scalable - hard to maintain as the network grows
110
Private: link local


2. The time delay for a router to match a network change?
Convergence
Maximizing address efficiency - organization - summarization
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.


3. An autonomous system could also be referred to as what?
Ever 2 seconds
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
Domain
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


4. How often are OSPF hello packets sent out?
1Gb/s
Every 10 seconds
Packet Header
Make sure you are in interface mode - then use this command ip access-group 1 out/in


5. Describe an Outbound ACL
Every 10 seconds
Automatically
Layers 1 & 2
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL


6. What are the major components of OSPF troubleshooting?
The Root bridge is the bridge with the lowest bridge ID
10Mb/s
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
It is never useful to send information about a route back in the direction from which the original info came.


7. Spanning-Tree cost of 19
100Mb/s
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.
Disable auto summarization
A link is an interface on a router


8. Nonbackbone - internal routers are aware of what topology
Only topology within their respective area.
Distance Vector
Area Border Router
Packets are processed before they are routed to an outbound interface.


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

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10. What are subinterfaces?
Multiple virtual interfaces that are associated with one physical interface
224.0.0.10
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Ever 2 seconds


11. Static VLAN is what?
To select the best path to the destination
Port based
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


12. What type of authentication does EIGRP use?
Disable auto summarization
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
Inter-VLAN routing


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

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14. Every ACL will need what?
15.....16 hops and the interface is down
The Root bridge is the bridge with the lowest bridge ID
Aka Subnet mask
A permit statement


15. What three types of IPv6 address types are there?
4
Unicast - Multicast - Anycast
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Link-State


16. What two parameters does EIGRP use to determine the best route?
Test Firsts/ Routes Second
Private: link local
Advertised Distance & Feasible distance
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0


17. What is an Autonomous System?
224.0.0.10
...
Domain
Because a loopback interface is always active and cannot be in a down state like a real interface can.


18. What is the multicast address for EIGRP?
224.0.0.10
Updates all DROTHER Routers when a change occurs
Multiple virtual interfaces that are associated with one physical interface
It is never useful to send information about a route back in the direction from which the original info came.


19. For an adjacency to occur what do the routers have to agree on?
Supports both unequal metric load balancing and equal metric balancing.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
View


20. What is prefix length?
Aka Subnet mask
Plaintext and MD5
Associating the network address with a local DLCI.
Different Autonomous Systems


21. What is one to nearest
Anycast
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
It is the signaling standard that maintains connection and statues between the DCE and DTE


22. How do you configure OSPF
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
MAC based
Data Link Connection Identifier


23. With OSPF - what must be defined?
A backbone area...Also known as Area 0
Only topology within their respective area.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Updates all DROTHER Routers when a change occurs


24. How do you apply the ACL to an interface
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
100Mb/s
View


25. What does a trunk do?

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26. What is OSPF multicast address?
Dijkstra's Algorithm
Maximizing address efficiency - organization - summarization
224.0.0.5
Layers 1 & 2


27. Can you delete individual entries in a specific ACL?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Only with Cisco IOS software release 12.3 (2) T
Each router builds a map of the network and determines the shortest path to every network.
Select the routing protocol - then specify the network.


28. What does partial refer to?
Supports both unequal metric load balancing and equal metric balancing.
20 seconds: 10 missed BPDU's
The update only includes info about the route change
Unspecified


29. The AS number must what?
Adjacency
Checks the source and destination address then permits or denies specific protocols
Only with Cisco IOS software release 12.3 (2) T
Match on all routers or it will not work


30. What is the spilt horizon rule?
Domain
Ever 2 seconds
It is never useful to send information about a route back in the direction from which the original info came.
Between areas?


31. How does Link-State work?
Packets are processed before they are routed to an outbound interface.
Updates all DROTHER Routers when a change occurs
Each router builds a map of the network and determines the shortest path to every network.
TRUE


32. What is the dead interval
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
A backbone area...Also known as Area 0
Unspecified
Automatically


33. What is needed to pass traffic from one VLAN to another?
A layer 3 switch or router
224.0.0.5
Select the routing protocol - then specify the network.
Adjacency


34. What is the Wildcard mask
The inverse of a subnet mask.
Six equal cost paths
A permit statement
10Mb/s


35. Why is EIGRP considered a Hybrid routing protocol?
Cisco - ANSI - Q.933A
View
It combines the advantages of Link-State and Distance vector routing protocols.
4 times the hello interval


36. What is the purpose of LMI
It is the signaling standard that maintains connection and statues between the DCE and DTE
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Connects the different areas
Because a loopback interface is always active and cannot be in a down state like a real interface can.


37. Explain OSPF

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38. OSPF will elect a what?
Link-State
20 seconds: 10 missed BPDU's
Designated Router (DR) and a Back-up designated Router (BDR)
Checks the source and destination address then permits or denies specific protocols


39. What two things need to be done to enable dynamic routing?
Select the routing protocol - then specify the network.
Designated Router (DR) and a Back-up designated Router (BDR)
Propagation of partial updates that are sent only to those routers that the changes affect.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication


40. How does inbound ACL work?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Test Firsts/ Routes Second
Ever 2 seconds
Checks the source address and then permits or denies the entire protocol suite


41. VTP Server Mode does what?

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42. How are Frame Relay Circuits identified?

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43. How does an outbound ACL work?
Ever 2 seconds
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Packets are processed before they are routed to an outbound interface.
Routes First/ Tests second


44. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Routes First/ Tests second
100Mb/s
2^n-2
16


45. Describe a Inbound ACL
0
Packets are processed before they are routed to an outbound interface.
Advance Distance Vector
If int status is UP/UP..Check to make sure OSPF is enabled on the interface


46. Formula for determining Subnets
A trunk
Checks the source and destination address then permits or denies specific protocols
To select the best path to the destination
2^n


47. For a VLAN to span across multiple switches What is required?
A trunk
Between areas?
Anycast
Connects the different areas


48. Rip is capable of load balancing over as many as?
Automatically
View
Layers 1 & 2
Six equal cost paths


49. How does an Extended ACL work?
Packet Header
Distance Vector
Automatically
Checks the source and destination address then permits or denies specific protocols


50. The no auto-summary command does what?
Advertised Distance & Feasible distance
By DLCI's
Forces protocols to behave as if they were classless
A trunk