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. VTP Transparent Mode does what?

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2. How does an outbound ACL work?
Only with Cisco IOS software release 12.3 (2) T
Routes First/ Tests second
Checks the source address and then permits or denies the entire protocol suite
4


3. What algorithm does EIGRP use?
The Diffusing Update Algorithm (DUAL)
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
No
30-50 seconds


4. What is the spilt horizon rule?
It is never useful to send information about a route back in the direction from which the original info came.
Reduce the link-state database and routing table
4
To select the best path to the destination


5. Formula for determining hosts
TRUE
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
The lower MAC address
2^n-2


6. How are Frame Relay Circuits identified?

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7. What does partial refer to?
A layer 3 switch or router
The update only includes info about the route change
Link-State
Ever 2 seconds


8. With ACL's where does the router extract information
4 times the hello interval
Aka Subnet mask
IETF
Packet Header


9. What do area's do?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Reduce the link-state database and routing table
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.
Carry's traffic for multiple VLANS


10. OSPF routes packets within a single?
Private: link local
Autonomous System
The lower MAC address
Disable auto summarization


11. What is a VLAN
A trunk
Each router builds a map of the network and determines the shortest path to every network.
Connects the different areas
A group of end stations with a common set of requirements - independent of their physical location


12. Advance Distance Vector or Hybrid uses what?
4 times the hello interval
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
A combination of Link-state and distance vector
Packets are processed before they are routed to an outbound interface.


13. What is the dead interval
Susceptible to routing loops
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Only with Cisco IOS software release 12.3 (2) T
20 seconds: 10 missed BPDU's


14. What type of algorithm does RIP use?
Distance Vector
Advertised Distance & Feasible distance
Autonomous System
To select the best path to the destination


15. For a VLAN to span across multiple switches What is required?
A backbone area...Also known as Area 0
A trunk
224.0.0.10
Anycast


16. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
The lower MAC address
Null
Ever 2 seconds
Bandwidth & Delay


17. How do you configure a sub interface?
IETF
Connects the different 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
Not scalable - hard to maintain as the network grows


18. Exterior Gateway Protocols are designed for use between
Different Autonomous Systems
Individual or group IP's
2^n
120


19. What are non designated routers called?
DROTHER
By DLCI's
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Because a loopback interface is always active and cannot be in a down state like a real interface can.


20. In frame relay What is Inverse Arp
32768
Associating the network address with a local DLCI.
Different Autonomous Systems
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0


21. What are the two ways routers can learn about the destination information?
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
1.) Enter the Routing Manually 2.) Use Dymamic Routing
It is never useful to send information about a route back in the direction from which the original info came.
By DLCI's


22. Dynamic VLAN is what?
To reduce OSPF traffic
Six equal cost paths
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
MAC based


23. What is passing VLAN traffic to another called?
Every 10 seconds
Ever 2 seconds
Inter-VLAN routing
EIGRP - OSPF - RIP


24. How often are OSPF hello packets sent out?
Unspecified
Advertised Distance & Feasible distance
A permit statement
Every 10 seconds


25. How is an EUI-64 format interface ID created from a 48-Bit MAC address
The Root bridge is the bridge with the lowest bridge ID
A group of end stations with a common set of requirements - independent of their physical location
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Every 10 seconds


26. Max_age time for BPDU's

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27. How does a Standard ACL work?
Checks the source address and then permits or denies the entire protocol suite
Anycast
Individual or group IP's
Supports both unequal metric load balancing and equal metric balancing.


28. How often are LMI's sent out?
Advertised Distance & Feasible distance
Every 10 Seconds
Multiple virtual interfaces that are associated with one physical interface
4 times the hello interval


29. What is ::1
Loopback
Port based
It combines the advantages of Link-State and Distance vector routing protocols.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs


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

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31. What is Frame Relay?
1Gb/s
Not scalable - hard to maintain as the network grows
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
It combines the advantages of Link-State and Distance vector routing protocols.


32. How does an Extended ACL work?
Match on all routers or it will not work
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Checks the source and destination address then permits or denies specific protocols
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL


33. What does EIGRP use to calculate it's metric?
...
To select the best path to the destination
The update only includes info about the route change
Bandwidth & Delay


34. What is needed to pass traffic from one VLAN to another?
4 times the hello interval
A layer 3 switch or router
Reduce the link-state database and routing table
Domain


35. Every ACL will need what?
A permit statement
20 seconds: 10 missed BPDU's
Dijkstra's Algorithm
A backbone area...Also known as Area 0


36. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
16
Multicast
10Mb/s
Bandwidth & Delay


37. How many hops are allowed with RIP?
It is the signaling standard that maintains connection and statues between the DCE and DTE
1.) Enter the Routing Manually 2.) Use Dymamic Routing
15.....16 hops and the interface is down
Link-State


38. What is the Wildcard mask
Checks the source address and then permits or denies the entire protocol suite
The inverse of a subnet mask.
Only topology within their respective area.
120


39. What is OSPF multicast address?
224.0.0.5
Distance Vector
No
1.) Enter the Routing Manually 2.) Use Dymamic Routing


40. Describe an Outbound ACL
The Root bridge is the bridge with the lowest bridge ID
Checks the source and destination address then permits or denies specific protocols
Supports both unequal metric load balancing and equal metric balancing.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL


41. What does a trunk do?

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42. Spanning-Tree cost of 100
10Mb/s
Private: link local
Cisco - ANSI - Q.933A
Distance Vector


43. What do you need to do if there are discontigous networks with EIGRP?
32768
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Disable auto summarization
Adjacency


44. With OSPF - there must always be a area......
It is never useful to send information about a route back in the direction from which the original info came.
0
Advance Distance Vector
MD5 and you have to enable it if you want to use it.


45. Purpose of a Routing Protocol?
All backup routes for destinations.
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
1Gb/s
Every 10 seconds


46. What is an ABR
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
Area Border Router
Routes First/ Tests second
30-50 seconds


47. Nonbackbone - internal routers are aware of what topology
Only topology within their respective area.
Test Firsts/ Routes Second
A layer 3 switch or router
Ever 2 seconds


48. How do you configure OSPF
Scalable and fast convergence
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
A trunk
The lower MAC address


49. How is the root bridge determined?
...
The lower MAC address
Port based
The Root bridge is the bridge with the lowest bridge ID


50. Admin distance of OSPF?
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
110
2^n-2
Associating the network address with a local DLCI.