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 classless protocols act classful by default?
The lower MAC address
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
RIPv2 & EIGRP
To select the best path to the destination


2. How does inbound ACL work?
Test Firsts/ Routes Second
...
Select the routing protocol - then specify the network.
A trunk


3. VTP Server Mode does what?

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4. Why is it important to have a loopback address when using OSPF?
Every 30 Seconds
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Because a loopback interface is always active and cannot be in a down state like a real interface can.


5. Purpose of a Routing Protocol?
224.0.0.10
Plaintext and MD5
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
The inverse of a subnet mask.


6. Max_age time for BPDU's

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7. OSPF routes packets within a single?
Autonomous System
Only with Cisco IOS software release 12.3 (2) T
Every 30 Seconds
Individual or group IP's


8. How do you configure a sub interface?
Between areas?
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
Test Firsts/ Routes Second
4


9. What is the default Bridge priority?
4 times the hello interval
...
Reduce the link-state database and routing table
32768


10. What is an Autonomous System?
...
Propagation of partial updates that are sent only to those routers that the changes affect.
All backup routes for destinations.
By DLCI's


11. What does the back bone router do?
Connects the different areas
TRUE
EIGRP - OSPF - RIP
Determines the cost which is the bandwidth


12. Example of a Routing Protocol?
Distance Vector
Every 10 Seconds
EIGRP - OSPF - RIP
Carry's traffic for multiple VLANS


13. Admin distance of EIGRP?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
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.
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
90


14. What are non designated routers called?
Cisco - ANSI - Q.933A
DROTHER
Null
A link is an interface on a router


15. How does EIGRP work with regards to Load Balancing
Supports both unequal metric load balancing and equal metric balancing.
1Gb/s
RIPv2 and EIGRP
If int status is UP/UP..Check to make sure OSPF is enabled on the interface


16. What does the DR do?
Link-State
Every 10 seconds
Maximizing address efficiency - organization - summarization
Updates all DROTHER Routers when a change occurs


17. Break down the word Link-State

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18. How often does a router send link-state advertisements?
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.
Routes First/ Tests second
Port based
Every 30 minutes by default


19. What two things need to be done to enable dynamic routing?
Select the routing protocol - then specify the network.
Every 5 seconds
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Telnet connectivity - authentication and extended ACLs


20. Rip is capable of load balancing over as many as?
DROTHER
Six equal cost paths
Area Border Router
Bandwidth & Delay


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

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22. Admin distance of OSPF?
TRUE
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
110


23. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Every 10 seconds
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.
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Only topology within their respective area.


24. Classful Protocols summarize
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.
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Automatically
A combination of Link-state and distance vector


25. Explain OSPF

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26. In regards to ACL's What are the three protocols?
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Adjacency
One ACL per protocol - One ACL per direction - Once ACL per interface
32768


27. How do you configure OSPF
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.
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
...
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0


28. Problem with static routes
4
MD5 and you have to enable it if you want to use it.
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.
Not scalable - hard to maintain as the network grows


29. Example of a Routed Protocol?
Advertised Distance & Feasible distance
Aka Subnet mask
IP
IETF


30. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
The lower MAC address
Determines the cost which is the bandwidth
It is the signaling standard that maintains connection and statues between the DCE and DTE
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.


31. Every ACL will need what?
A permit statement
Checks the source and destination address then permits or denies specific protocols
Multiple virtual interfaces that are associated with one physical interface
Forces protocols to behave as if they were classless


32. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
Distance Vector
4 times the hello interval
Layers 1 & 2
TRUE


33. What type of algorithm does RIP use?
Connects the different areas
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
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.
Distance Vector


34. What address is FE80:/10
Convergence
Private: link local
Disable auto summarization
It combines the advantages of Link-State and Distance vector routing protocols.


35. What type of authentication does EIGRP use?
Dijkstra's Algorithm
No
MD5 and you have to enable it if you want to use it.
Inter-VLAN routing


36. What is ::1
2^n-2
Loopback
Only topology within their respective area.
Determines the cost which is the bandwidth


37. What are subinterfaces?
Multiple virtual interfaces that are associated with one physical interface
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Advance Distance Vector
Convergence


38. What is the default load balancing for RIP
Plaintext and MD5
To select the best path to the destination
Packets are processed before they are routed to an outbound interface.
4


39. What are the two ways routers can learn about the destination information?
Advance Distance Vector
Forces protocols to behave as if they were classless
The inverse of a subnet mask.
1.) Enter the Routing Manually 2.) Use Dymamic Routing


40. What is OSPF multicast address?
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.
224.0.0.5
Cisco - ANSI - Q.933A
30-50 seconds


41. What is one to many?
The update only includes info about the route change
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Multicast
16


42. Why is this done?
Carry's traffic for multiple VLANS
To reduce OSPF traffic
...
Area Border Router


43. The AS number must what?
Every 10 Seconds
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
DROTHER
Match on all routers or it will not work


44. What two parameters does EIGRP use to determine the best route?
Forces protocols to behave as if they were classless
4
Advertised Distance & Feasible distance
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication


45. What type of algorithm does OSPF & IS-IS use?
The Diffusing Update Algorithm (DUAL)
20 seconds: 10 missed BPDU's
Maximizing address efficiency - organization - summarization
Link-State


46. With ACL's where does the router extract information
224.0.0.10
Layers 1 & 2
Multiple virtual interfaces that are associated with one physical interface
Packet Header


47. With OSPF - what must be defined?
Convergence
A backbone area...Also known as Area 0
The Root bridge is the bridge with the lowest bridge ID
20 seconds: 10 missed BPDU's


48. An autonomous system could also be referred to as what?
Domain
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.
Only with Cisco IOS software release 12.3 (2) T
16


49. Nonbackbone - internal routers are aware of what topology
Bandwidth & Delay
Private: link local
Only topology within their respective area.
A backbone area...Also known as Area 0


50. How often are LMI's sent out?
Every 10 Seconds
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
A combination of Link-state and distance vector
Multicast