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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. The AS number must what?
Convergence
Checks the source address and then permits or denies the entire protocol suite
Aka Subnet mask
Match on all routers or it will not work

2. Formula for determining hosts
Multicast
Reduce the link-state database and routing table
Autonomous System
2^n-2

3. Admin distance of RIPv2
120
Supports both unequal metric load balancing and equal metric balancing.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers

4. What two parameters does EIGRP use to determine the best route?
Advertised Distance & Feasible distance
Propagation of partial updates that are sent only to those routers that the changes affect.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers

5. How does EIGRP work with regards to Load Balancing
Supports both unequal metric load balancing and equal metric balancing.
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
Plaintext and MD5

6. Admin distance of a connected Network?
0
Cisco - ANSI - Q.933A
100Mb/s
2^n-2

7. Can a Router exchange routing information if they are using different Routing Protocols?
Updates all DROTHER Routers when a change occurs
One ACL per protocol - One ACL per direction - Once ACL per interface
A link is an interface on a router
No

8. What does partial refer to?
Inter-VLAN routing
Unspecified
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
The update only includes info about the route change

9. How does a Standard ACL work?
The Diffusing Update Algorithm (DUAL)
Link-State
Checks the source address and then permits or denies the entire protocol suite
4

10. Describe features of RIPv2
Checks the source and destination address then permits or denies specific protocols
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Determines the cost which is the bandwidth
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

11. Wildcard masks filter

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12. What two things need to be done to enable dynamic routing?
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Packet Header
Updates all DROTHER Routers when a change occurs
Select the routing protocol - then specify the network.

13. How many hops are allowed with RIP?
MD5 and you have to enable it if you want to use it.
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Every 10 Seconds
15.....16 hops and the interface is down

14. What is the spilt horizon rule?
Select the routing protocol - then specify the network.
Match on all routers or it will not work
It is never useful to send information about a route back in the direction from which the original info came.
The update only includes info about the route change

15. Who designed OSPF?
Designated Router (DR) and a Back-up designated Router (BDR)
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
IETF
By DLCI's

16. Explain how routing loops occur with RIP?
Susceptible to routing loops
A permit statement
...
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.

17. How often does a router send link-state advertisements?
Distance Vector
Unicast - Multicast - Anycast
Between areas?
Every 30 minutes by default

18. Spanning-Tree cost of 100
TRUE
10Mb/s
Plaintext and MD5
Multiple virtual interfaces that are associated with one physical interface

19. How long is the dead interval
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
16
4 times the hello interval
The Diffusing Update Algorithm (DUAL)

20. What type of authentication does EIGRP use?
MD5 and you have to enable it if you want to use it.
It is the signaling standard that maintains connection and statues between the DCE and DTE
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration

21. What type of algorithm does OSPF & IS-IS use?
Link-State
Determines the cost which is the bandwidth
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

22. What does the back bone router do?
Autonomous System
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Scalable and fast convergence
Connects the different areas

23. Exterior Gateway Protocols are designed for use between
Plaintext and MD5
Different Autonomous Systems
For line vty 0 4
Aka Subnet mask

24. Problem with RIP
It is never useful to send information about a route back in the direction from which the original info came.
Susceptible to routing loops
10Mb/s
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

25. What is ::1
Loopback
Between areas?
The lower MAC address
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

26. What does bounded refer to?
Only topology within their respective area.
1
Propagation of partial updates that are sent only to those routers that the changes affect.
Multicast

27. Advance Distance Vector or Hybrid uses what?
1
Ever 2 seconds
A combination of Link-state and distance vector
4 times the hello interval

28. The time delay for a router to match a network change?
Domain
110
Convergence
Area Border Router

29. Formula for determining Subnets
The Diffusing Update Algorithm (DUAL)
To select the best path to the destination
2^n
100Mb/s

30. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
The lower MAC address
16
MD5 and you have to enable it if you want to use it.
DROTHER

31. What is OSPF multicast address?
224.0.0.5
Every 30 Seconds
The inverse of a subnet mask.
The Diffusing Update Algorithm (DUAL)

32. What is the purpose of LMI
Make sure you are in interface mode - then use this command ip access-group 1 out/in
A group of end stations with a common set of requirements - independent of their physical location
It is the signaling standard that maintains connection and statues between the DCE and DTE
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

33. How does an outbound ACL work?
0
224.0.0.10
Match on all routers or it will not work
Routes First/ Tests second

34. Why is EIGRP considered a Hybrid routing protocol?
224.0.0.5
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
It combines the advantages of Link-State and Distance vector routing protocols.
One ACL per protocol - One ACL per direction - Once ACL per interface

35. Rip is capable of load balancing over as many as?
4
Autonomous System
For line vty 0 4
Six equal cost paths

36. What distant vector protocols exhibit classless behavior?
RIPv2 and EIGRP
224.0.0.5
Different Autonomous Systems
Disable auto summarization

37. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Reduce the link-state database and routing table
The Diffusing Update Algorithm (DUAL)
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.

38. What is an Autonomous System?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Different Autonomous Systems
90
...

39. Can you delete individual entries in a specific ACL?
10Mb/s
Ever 2 seconds
Private: link local
Only with Cisco IOS software release 12.3 (2) T

40. What are subinterfaces?
Anycast
Multiple virtual interfaces that are associated with one physical interface
16
To reduce OSPF traffic

41. How does an Extended ACL work?
A combination of Link-state and distance vector
Between areas?
Ever 2 seconds
Checks the source and destination address then permits or denies specific protocols

42. Admin distance of OSPF?
Propagation of partial updates that are sent only to those routers that the changes affect.
224.0.0.10
110
Every 30 Seconds

43. What does a trunk do?

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44. With OSPF - what must be defined?
Checks the source and destination address then permits or denies specific protocols
A backbone area...Also known as Area 0
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
One ACL per protocol - One ACL per direction - Once ACL per interface

45. For a VLAN to span across multiple switches What is required?
A trunk
View
20 seconds: 10 missed BPDU's
Ever 2 seconds

46. In regards to ACL's What are the three protocols?
224.0.0.5
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Link-State
One ACL per protocol - One ACL per direction - Once ACL per interface

47. Normal time for STP convergence
30-50 seconds
A group of end stations with a common set of requirements - independent of their physical location
Convergence
2^n

48. Dynamic ACL's are dependent on what?
Port based
Telnet connectivity - authentication and extended ACLs
4
Ever 2 seconds

49. What is prefix length?
EIGRP - OSPF - RIP
4
It is the signaling standard that maintains connection and statues between the DCE and DTE
Aka Subnet mask

50. What is one to nearest
1Gb/s
Anycast
Every 10 seconds
Disable auto summarization

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