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. An OSPF neighbor relationship can also be called what?
Distance Vector
Adjacency
TRUE
1Gb/s


2. How do you configure a sub interface?
Each router builds a map of the network and determines the shortest path to every network.
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
2^n-2
Every 30 Seconds


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

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4. What is ::1
IETF
Adjacency
Area Border Router
Loopback


5. What is a VLAN
A group of end stations with a common set of requirements - independent of their physical location
16
Every 10 seconds
Only with Cisco IOS software release 12.3 (2) T


6. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
16
The lower MAC address
No
Autonomous System


7. Admin distance of a connected Network?
Susceptible to routing loops
1.) Enter the Routing Manually 2.) Use Dymamic Routing
A permit statement
0


8. Admin distance of EIGRP?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Carry's traffic for multiple VLANS
90
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.


9. VTP Server Mode does what?

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10. Who designed OSPF?
Packets are processed before they are routed to an outbound interface.
0
Associating the network address with a local DLCI.
IETF


11. What distant vector protocols exhibit classless behavior?
RIPv2 and EIGRP
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Select the routing protocol - then specify the network.
IETF


12. In Link state terminology - What is a link?
Connects the different areas
Six equal cost paths
The inverse of a subnet mask.
A link is an interface on a router


13. Describe a Inbound ACL
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
The inverse of a subnet mask.
110
Packets are processed before they are routed to an outbound interface.


14. How does the SPF determine the shortest path?
224.0.0.10
Designated Router (DR) and a Back-up designated Router (BDR)
Determines the cost which is the bandwidth
To select the best path to the destination


15. What is the default for equal cost paths for load balancing with OSPF?
4
120
Advertised Distance & Feasible distance
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers


16. What are the major components of OSPF troubleshooting?
4
Area Border Router
224.0.0.10
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication


17. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
Every 30 minutes by default
4
The lower MAC address
Maximizing address efficiency - organization - summarization


18. What three types of IPv6 address types are there?
0
By DLCI's
20 seconds: 10 missed BPDU's
Unicast - Multicast - Anycast


19. For a VLAN to span across multiple switches What is required?
Area Border Router
By DLCI's
0
A trunk


20. The advantages of VLSM
Maximizing address efficiency - organization - summarization
EIGRP - OSPF - RIP
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Area Border Router


21. VTP Transparent Mode does what?

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22. What two classless protocols act classful by default?
...
20 seconds: 10 missed BPDU's
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
RIPv2 & EIGRP


23. What is prefix length?
Layers 1 & 2
Data Link Connection Identifier
Aka Subnet mask
20 seconds: 10 missed BPDU's


24. What do area's do?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
One ACL per protocol - One ACL per direction - Once ACL per interface
Reduce the link-state database and routing table
Ever 2 seconds


25. Formula for determining hosts
2^n-2
Cisco - ANSI - Q.933A
Data Link Connection Identifier
...


26. OSPF will elect a what?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Reduce the link-state database and routing table
No
Designated Router (DR) and a Back-up designated Router (BDR)


27. Dynamic VLAN is what?
Adjacency
224.0.0.10
MAC based
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.


28. How is an EUI-64 format interface ID created from a 48-Bit MAC address
2^n
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
It combines the advantages of Link-State and Distance vector routing protocols.
0


29. Routers are used for what?
100Mb/s
To select the best path to the destination
Layers 1 & 2
1Gb/s


30. Why is it important to have a loopback address when using OSPF?
Only with Cisco IOS software release 12.3 (2) T
To select the best path to the destination
TRUE
Because a loopback interface is always active and cannot be in a down state like a real interface can.


31. What is an ABR
Area Border Router
MD5 and you have to enable it if you want to use it.
Make sure you are in interface mode - then use this command ip access-group 1 out/in
RIPv2 and EIGRP


32. How often are LMI's sent out?
Every 10 Seconds
Carry's traffic for multiple VLANS
By DLCI's
A trunk


33. Can you delete individual entries in a specific ACL?
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.
Maximizing address efficiency - organization - summarization
Only with Cisco IOS software release 12.3 (2) T
To reduce OSPF traffic


34. Formula for determining Subnets
Reduce the link-state database and routing table
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
2^n
A protocol on how to communicate with other routers


35. Spanning-Tree coast of 4
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Maximizing address efficiency - organization - summarization
1Gb/s
Packet Header


36. How are Frame Relay Circuits identified?

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37. Can a Router exchange routing information if they are using different Routing Protocols?
A combination of Link-state and distance vector
No
4
1.) Enter the Routing Manually 2.) Use Dymamic Routing


38. What does partial refer to?
The update only includes info about the route change
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Private: link local
It combines the advantages of Link-State and Distance vector routing protocols.


39. Normal time for STP convergence
20 seconds: 10 missed BPDU's
15.....16 hops and the interface is down
Checks the source address and then permits or denies the entire protocol suite
30-50 seconds


40. Every ACL will need what?
30-50 seconds
It is never useful to send information about a route back in the direction from which the original info came.
Aka Subnet mask
A permit statement


41. How does a Standard ACL work?
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 address and then permits or denies the entire protocol suite
Automatically
Domain


42. What algorithm does EIGRP use?
15.....16 hops and the interface is down
32768
Select the routing protocol - then specify the network.
The Diffusing Update Algorithm (DUAL)


43. Explain how routing loops occur with RIP?
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
...
Between areas?
Unspecified


44. What are two statements that are true of IPv6 address representation?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Convergence
TRUE
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.


45. Why is this done?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Advance Distance Vector
Telnet connectivity - authentication and extended ACLs
To reduce OSPF traffic


46. With OSPF - there must always be a area......
A backbone area...Also known as Area 0
90
0
15.....16 hops and the interface is down


47. Wildcard masks filter

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48. What type of algorithm does EIGRP use?
RIPv2 & EIGRP
Every 10 seconds
Advance Distance Vector
Propagation of partial updates that are sent only to those routers that the changes affect.


49. With ACL's where does the router extract information
Six equal cost paths
A trunk
A group of end stations with a common set of requirements - independent of their physical location
Packet Header


50. Problem with static routes
Not scalable - hard to maintain as the network grows
Domain
Packets are processed before they are routed to an outbound interface.
MD5 and you have to enable it if you want to use it.