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CCNA

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. Describe features of RIPv2
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Null
16
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

2. What three types of IPv6 address types are there?
Unicast - Multicast - Anycast
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Distance Vector
Autonomous System

3. Admin distance of OSPF?
It is the signaling standard that maintains connection and statues between the DCE and DTE
Dijkstra's Algorithm
110
For line vty 0 4

4. Spanning-Tree cost of 19
Link-State
90
Checks the source and destination address then permits or denies specific protocols
100Mb/s

5. What is an Autonomous System?
224.0.0.10
Dijkstra's Algorithm
...
Cisco - ANSI - Q.933A

6. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
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
TRUE
Convergence
Autonomous System

7. Dynamic ACL's are dependent on what?
Individual or group IP's
Designated Router (DR) and a Back-up designated Router (BDR)
Propagation of partial updates that are sent only to those routers that the changes affect.
Telnet connectivity - authentication and extended ACLs

8. 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.
Plaintext and MD5
No
A link is an interface on a router

9. What type of authentication does EIGRP use?
To select the best path to the destination
MD5 and you have to enable it if you want to use it.
For line vty 0 4
4

10. What are the three LMI standards
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Cisco - ANSI - Q.933A
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Multiple virtual interfaces that are associated with one physical interface

11. What are two statements that are true of IPv6 address representation?
1
Adjacency
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
32768

12. Can a Router exchange routing information if they are using different Routing Protocols?
No
A link is an interface on a router
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Convergence

13. Explain OSPF

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14. What address is FE80:/10
Private: link local
The update only includes info about the route change
16
Multiple virtual interfaces that are associated with one physical interface

15. What is the default Bridge priority?
4 times the hello interval
32768
Loopback
It combines the advantages of Link-State and Distance vector routing protocols.

16. Purpose of a Routing Protocol?
A layer 3 switch or router
Private: link local
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
A link is an interface on a router

17. Describe an Outbound ACL
2^n-2
Routes First/ Tests second
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
One ACL per protocol - One ACL per direction - Once ACL per interface

18. An autonomous system could also be referred to as what?
The inverse of a subnet mask.
Inter-VLAN routing
Updates all DROTHER Routers when a change occurs
Domain

19. How often are OSPF hello packets sent out?
It is never useful to send information about a route back in the direction from which the original info came.
Automatically
Every 10 seconds
It combines the advantages of Link-State and Distance vector routing protocols.

20. What is the default load balancing for RIP
Advance Distance Vector
Propagation of partial updates that are sent only to those routers that the changes affect.
Cisco - ANSI - Q.933A
4

21. Explain how routing loops occur with RIP?
The Root bridge is the bridge with the lowest bridge ID
Packets are processed before they are routed to an outbound interface.
...
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

22. Why is it important to have a loopback address when using OSPF?
Plaintext and MD5
1
A link is an interface on a router
Because a loopback interface is always active and cannot be in a down state like a real interface can.

23. With OSPF - what must be defined?
DROTHER
A trunk
A backbone area...Also known as Area 0
Each router builds a map of the network and determines the shortest path to every network.

24. With OSPF - there must always be a area......
0
Private: link local
IETF
Every 30 minutes by default

25. Normal time for STP convergence
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Designated Router (DR) and a Back-up designated Router (BDR)
It combines the advantages of Link-State and Distance vector routing protocols.
30-50 seconds

26. How is the root bridge determined?
The Root bridge is the bridge with the lowest bridge ID
Checks the source address and then permits or denies the entire protocol suite
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Associating the network address with a local DLCI.

27. VTP Server Mode does what?

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28. Routers are used for what?
To select the best path to the destination
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Six equal cost paths
Distance Vector

29. What is Frame Relay?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
TRUE
Maximizing address efficiency - organization - summarization
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

30. What is the default for equal cost paths for load balancing with OSPF?
4
Select the routing protocol - then specify the network.
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Anycast

31. When do you use Access-Class
0
For line vty 0 4
16
Forces protocols to behave as if they were classless

32. What is needed to pass traffic from one VLAN to another?
16
Every 10 seconds
A layer 3 switch or router
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.

33. Spanning-Tree cost of 100
10Mb/s
16
Select the routing protocol - then specify the network.
The Root bridge is the bridge with the lowest bridge ID

34. Classful Protocols summarize
Dijkstra's Algorithm
Private: link local
A protocol on how to communicate with other routers
Automatically

35. How does a Standard ACL work?
Checks the source address and then permits or denies the entire protocol suite
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
15.....16 hops and the interface is down
TRUE

36. What Layer does Frame Relay operate at?
IETF
Inter-VLAN routing
Layers 1 & 2
The Diffusing Update Algorithm (DUAL)

37. Spanning-Tree coast of 4
Checks the source and destination address then permits or denies specific protocols
By DLCI's
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
1Gb/s

38. With ACL's where does the router extract information
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Every 30 Seconds
Packet Header
TRUE

39. The time delay for a router to match a network change?
Convergence
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
A backbone area...Also known as Area 0
Susceptible to routing loops

40. The advantages of VLSM
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Maximizing address efficiency - organization - summarization
10Mb/s
Inter-VLAN routing

41. Example of a Routed Protocol?
Determines the cost which is the bandwidth
IP
Area Border Router
0

42. How is an EUI-64 format interface ID created from a 48-Bit MAC address
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Convergence
Carry's traffic for multiple VLANS
Maximizing address efficiency - organization - summarization

43. Problem with RIP
Area Border Router
To select the best path to the destination
Susceptible to routing loops
The update only includes info about the route change

44. How does an outbound ACL work?
Routes First/ Tests second
The update only includes info about the route change
The lower MAC address
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration

45. How does inbound ACL work?
Test Firsts/ Routes Second
15.....16 hops and the interface is down
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Convergence

46. Can you delete individual entries in a specific ACL?
Only with Cisco IOS software release 12.3 (2) T
View
110
Port based

47. What does the back bone router do?
Scalable and fast convergence
Connects the different areas
Inter-VLAN routing
Every 10 Seconds

48. In regards to troubleshooting OSPF what should you check?
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Between areas?
DROTHER
Data Link Connection Identifier

49. What do area's do?
Reduce the link-state database and routing table
Supports both unequal metric load balancing and equal metric balancing.
Anycast
Routes First/ Tests second

50. A router running EIGRP will store what?
A combination of Link-state and distance vector
All backup routes for destinations.
Individual or group IP's
To select the best path to the destination

Can you answer 50 questions in 15 minutes?

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