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. Benefits of OSPF?
Checks the source and destination address then permits or denies specific protocols
Scalable and fast convergence
Distance Vector
2^n-2


2. How is the root bridge determined?
Checks the source and destination address then permits or denies specific protocols
Every 30 minutes by default
The Root bridge is the bridge with the lowest bridge ID
A permit statement


3. Exterior Gateway Protocols are designed for use between
32768
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Different Autonomous Systems
Advertised Distance & Feasible distance


4. How are Frame Relay Circuits identified?

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5. VTP Server Mode does what?

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6. What two classless protocols act classful by default?
...
Inter-VLAN routing
RIPv2 & EIGRP
Susceptible to routing loops


7. What is an ABR
Match on all routers or it will not work
TRUE
Area Border Router
Convergence


8. Problem with static routes
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Not scalable - hard to maintain as the network grows
Anycast
15.....16 hops and the interface is down


9. How does Link-State work?
The lower MAC address
Each router builds a map of the network and determines the shortest path to every network.
Layers 1 & 2
IP


10. What is the Wildcard mask
The inverse of a subnet mask.
Updates all DROTHER Routers when a change occurs
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL


11. An OSPF neighbor relationship can also be called what?
Adjacency
Every 30 minutes by default
To reduce OSPF traffic
Match on all routers or it will not work


12. How often are OSPF hello packets sent out?
Checks the source and destination address then permits or denies specific protocols
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.
Convergence
Every 10 seconds


13. VTP Client Mode does what?

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14. Break down the word Link-State

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15. How does an outbound ACL work?
2^n
Routes First/ Tests second
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
Data Link Connection Identifier


16. In regards to troubleshooting OSPF what should you check?
Scalable and fast convergence
The inverse of a subnet mask.
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
4


17. For an adjacency to occur what do the routers have to agree on?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
To select the best path to the destination
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Every 5 seconds


18. What is the default Bridge priority?
1
Susceptible to routing loops
32768
Layers 1 & 2


19. How does an Extended ACL work?
Propagation of partial updates that are sent only to those routers that the changes affect.
A layer 3 switch or router
Checks the source and destination address then permits or denies specific protocols
Six equal cost paths


20. Admin distance of RIPv2
120
0
Carry's traffic for multiple VLANS
Multiple virtual interfaces that are associated with one physical interface


21. What are the three LMI standards
Advertised Distance & Feasible distance
Cisco - ANSI - Q.933A
By DLCI's
EIGRP - OSPF - RIP


22. Can you delete individual entries in a specific ACL?
Every 30 Seconds
Only with Cisco IOS software release 12.3 (2) T
Cisco - ANSI - Q.933A
Packets are processed before they are routed to an outbound interface.


23. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
RIPv2 & EIGRP
Autonomous System
TRUE
15.....16 hops and the interface is down


24. Admin distance of EIGRP?
IP
Because a loopback interface is always active and cannot be in a down state like a real interface can.
90
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


25. How does a Standard ACL work?
Between areas?
Port based
Link-State
Checks the source address and then permits or denies the entire protocol suite


26. Static VLAN is what?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Link-State
Bandwidth & Delay
Port based


27. How do you configure a sub interface?
To reduce OSPF traffic
Checks the source and destination address then permits or denies specific protocols
Because a loopback interface is always active and cannot be in a down state like a real interface can.
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


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

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29. When do you use Access-Class
Propagation of partial updates that are sent only to those routers that the changes affect.
For line vty 0 4
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Select the routing protocol - then specify the network.


30. How often are BPDU's sent?
Ever 2 seconds
Domain
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication


31. How does inbound ACL work?
Between areas?
Layers 1 & 2
Test Firsts/ Routes Second
20 seconds: 10 missed BPDU's


32. In Link state terminology - What is a link?
EIGRP - OSPF - RIP
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
A link is an interface on a router


33. Admin distance of a connected Network?
Data Link Connection Identifier
0
A group of end stations with a common set of requirements - independent of their physical location
Convergence


34. How is an EUI-64 format interface ID created from a 48-Bit MAC address
Connects the different areas
110
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.


35. What is prefix length?
MAC based
Maximizing address efficiency - organization - summarization
Aka Subnet mask
Layers 1 & 2


36. What do you need to do if there are discontigous networks with EIGRP?
Ever 2 seconds
4
Disable auto summarization
IP


37. Wildcard masks filter

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38. Purpose of a Routing Protocol?
Connects the different areas
Scalable and fast convergence
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Automatically


39. What two things need to be done to enable dynamic routing?
All backup routes for destinations.
Select the routing protocol - then specify the network.
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
120


40. Describe features of RIPv1
RIPv2 & EIGRP
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Private: link local
To select the best path to the destination


41. What is one to nearest
Reduce the link-state database and routing table
RIPv2 and EIGRP
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.
Anycast


42. What is needed to pass traffic from one VLAN to another?
Cisco - ANSI - Q.933A
90
Every 10 seconds
A layer 3 switch or router


43. Why is this done?
224.0.0.5
To reduce OSPF traffic
Data Link Connection Identifier
RIPv2 and EIGRP


44. VTP Transparent Mode does what?

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

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46. Who designed OSPF?
Susceptible to routing loops
IETF
1Gb/s
Designated Router (DR) and a Back-up designated Router (BDR)


47. 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
4
Designated Router (DR) and a Back-up designated Router (BDR)
IETF


48. What Layer does Frame Relay operate at?
Layers 1 & 2
View
Not scalable - hard to maintain as the network grows
A backbone area...Also known as Area 0


49. Every ACL will need what?
It is the signaling standard that maintains connection and statues between the DCE and DTE
Scalable and fast convergence
A permit statement
A combination of Link-state and distance vector


50. Formula for determining hosts
DROTHER
2^n-2
Loopback
4