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. Can you delete individual entries in a specific ACL?
2^n-2
Only with Cisco IOS software release 12.3 (2) T
Associating the network address with a local DLCI.
Distance Vector


2. Routers are used for what?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Packets are processed before they are routed to an outbound interface.
Multiple virtual interfaces that are associated with one physical interface
To select the best path to the destination


3. Formula for determining Subnets
Dijkstra's Algorithm
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Not scalable - hard to maintain as the network grows
2^n


4. With ACL's where does the router extract information
Layers 1 & 2
Every 30 Seconds
Packet Header
Test Firsts/ Routes Second


5. What are the major components of OSPF troubleshooting?
Supports both unequal metric load balancing and equal metric balancing.
1
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
4 times the hello interval


6. What are the three LMI standards
Maximizing address efficiency - organization - summarization
90
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Cisco - ANSI - Q.933A


7. What is the purpose of LMI
The update only includes info about the route change
2^n-2
Test Firsts/ Routes Second
It is the signaling standard that maintains connection and statues between the DCE and DTE


8. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
The lower MAC address
Port based
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
DROTHER


9. What does partial refer to?
30-50 seconds
Cisco - ANSI - Q.933A
Because a loopback interface is always active and cannot be in a down state like a real interface can.
The update only includes info about the route change


10. What two classless protocols act classful by default?
EIGRP - OSPF - RIP
4
RIPv2 & EIGRP
If int status is UP/UP..Check to make sure OSPF is enabled on the interface


11. In frame relay What is Inverse Arp
Every 10 Seconds
Associating the network address with a local DLCI.
90
Maximizing address efficiency - organization - summarization


12. What is the Wildcard mask
The inverse of a subnet mask.
Anycast
Different Autonomous Systems
Loopback


13. How does the SPF determine the shortest path?
To select the best path to the destination
Determines the cost which is the bandwidth
Updates all DROTHER Routers when a change occurs
Port based


14. What is passing VLAN traffic to another called?
Maximizing address efficiency - organization - summarization
Inter-VLAN routing
To reduce OSPF traffic
Advertised Distance & Feasible distance


15. How often are LMI's sent out?
RIPv2 & EIGRP
Every 10 Seconds
The inverse of a subnet mask.
Each router builds a map of the network and determines the shortest path to every network.


16. What does the DR do?
Dijkstra's Algorithm
The inverse of a subnet mask.
A trunk
Updates all DROTHER Routers when a change occurs


17. How does an outbound ACL work?
Dijkstra's Algorithm
Routes First/ Tests second
Connects the different areas
224.0.0.10


18. What are non designated routers called?
Determines the cost which is the bandwidth
A backbone area...Also known as Area 0
DROTHER
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication


19. What is the default for equal cost paths for load balancing with OSPF?
4
One ACL per protocol - One ACL per direction - Once ACL per interface
Supports both unequal metric load balancing and equal metric balancing.
By DLCI's


20. What does DLCI stand for?
Only with Cisco IOS software release 12.3 (2) T
Data Link Connection Identifier
Inter-VLAN routing
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers


21. Who designed OSPF?
Layers 1 & 2
A link is an interface on a router
IETF
IP


22. An OSPF neighbor relationship can also be called what?
Port based
Adjacency
The inverse of a subnet mask.
2^n-2


23. How many hops are allowed with RIP?
Every 10 Seconds
15.....16 hops and the interface is down
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
The update only includes info about the route change


24. Exterior Gateway Protocols are designed for use between
Adjacency
Different Autonomous Systems
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
4


25. What is an ABR
For line vty 0 4
20 seconds: 10 missed BPDU's
No
Area Border Router


26. The advantages of VLSM
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Telnet connectivity - authentication and extended ACLs
Maximizing address efficiency - organization - summarization
Adjacency


27. Why is this done?
To reduce OSPF traffic
Dijkstra's Algorithm
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.
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.


28. Advance Distance Vector or Hybrid uses what?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Ever 2 seconds
Connects the different areas
A combination of Link-state and distance vector


29. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Disable auto summarization
Supports both unequal metric load balancing and equal metric balancing.
120
View


30. How are Frame Relay Circuits identified?

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31. Spanning-Tree cost of 19
Private: link local
IP
100Mb/s
Data Link Connection Identifier


32. What does a trunk do?

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33. Problem with RIP
Susceptible to routing loops
A protocol on how to communicate with other routers
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Bandwidth & Delay


34. What is prefix length?
Six equal cost paths
Area Border Router
Aka Subnet mask
Routes First/ Tests second


35. How does an Extended ACL work?
Convergence
Unspecified
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Checks the source and destination address then permits or denies specific protocols


36. Explain OSPF

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37. What distant vector protocols exhibit classless behavior?
Scalable and fast convergence
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Convergence
RIPv2 and EIGRP


38. The time delay for a router to match a network change?
A link is an interface on a router
Different Autonomous Systems
Convergence
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication


39. By default OSPF uses what type of authentication?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Each router builds a map of the network and determines the shortest path to every network.
A permit statement
Null


40. What type of authentication does EIGRP use?
DROTHER
Ever 2 seconds
MD5 and you have to enable it if you want to use it.
Area Border Router


41. Summarization of network information usually occurs where?
0
To reduce OSPF traffic
Disable auto summarization
Between areas?


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

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43. What is ::
Port based
Unspecified
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Six equal cost paths


44. In regards to ACL's What are the three protocols?
It combines the advantages of Link-State and Distance vector routing protocols.
One ACL per protocol - One ACL per direction - Once ACL per interface
MAC based
Supports both unequal metric load balancing and equal metric balancing.


45. What is the multicast address for EIGRP?
Data Link Connection Identifier
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Port based
224.0.0.10


46. How do you configure OSPF
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
It is never useful to send information about a route back in the direction from which the original info came.
Autonomous System
Make sure you are in interface mode - then use this command ip access-group 1 out/in


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

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48. VTP Transparent Mode does what?

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49. What is one to many?
2^n
Multicast
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Routes First/ Tests second


50. When do you use Access-Class
For line vty 0 4
Each router builds a map of the network and determines the shortest path to every network.
Layers 1 & 2
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers