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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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1. Spanning-Tree cost of 100
Make sure you are in interface mode - then use this command ip access-group 1 out/in
IP
10Mb/s
A backbone area...Also known as Area 0

2. Example of a Routed Protocol?
Dijkstra's Algorithm
To select the best path to the destination
IP
By DLCI's

3. What type of algorithm does EIGRP use?
Advance Distance Vector
Updates all DROTHER Routers when a change occurs
Private: link local
4

4. What is passing VLAN traffic to another called?
20 seconds: 10 missed BPDU's
Inter-VLAN routing
Forces protocols to behave as if they were classless
Multiple virtual interfaces that are associated with one physical interface

5. What is ::1
Loopback
Advance Distance Vector
Susceptible to routing loops
Propagation of partial updates that are sent only to those routers that the changes affect.

6. How do you configure a sub interface?
Propagation of partial updates that are sent only to those routers that the changes affect.
Not scalable - hard to maintain as the network grows
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
RIPv2 & EIGRP

7. What are the three LMI standards
Checks the source address and then permits or denies the entire protocol suite
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Cisco - ANSI - Q.933A
Adjacency

8. Problem with static routes
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Not scalable - hard to maintain as the network grows
It is the signaling standard that maintains connection and statues between the DCE and DTE
Autonomous System

9. What is the multicast address for EIGRP?
Ever 2 seconds
224.0.0.10
0
MAC based

10. Describe features of RIPv1
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
The update only includes info about the route change
RIPv2 and EIGRP

11. VTP Transparent Mode does what?

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12. What is needed to pass traffic from one VLAN to another?
Propagation of partial updates that are sent only to those routers that the changes affect.
A layer 3 switch or router
Telnet connectivity - authentication and extended ACLs
Convergence

13. How does the SPF determine the shortest path?
A combination of Link-state and distance vector
Determines the cost which is the bandwidth
RIPv2 & EIGRP
Every 30 Seconds

14. With OSPF - there must always be a area......
A layer 3 switch or router
0
Port based
To reduce OSPF traffic

15. What is one to many?
Designated Router (DR) and a Back-up designated Router (BDR)
Multicast
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

16. How is the root bridge determined?
Port based
The Root bridge is the bridge with the lowest bridge ID
MAC based
2^n-2

17. What distant vector protocols exhibit classless behavior?
RIPv2 and EIGRP
Packets are processed before they are routed to an outbound interface.
15.....16 hops and the interface is down
Designated Router (DR) and a Back-up designated Router (BDR)

18. Max_age time for BPDU's

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19. Why is this done?
Checks the source address and then permits or denies the entire protocol suite
20 seconds: 10 missed BPDU's
To reduce OSPF traffic
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs

20. What are the two ways routers can learn about the destination information?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
To select the best path to the destination
Susceptible to routing loops
No

21. What does DLCI stand for?
224.0.0.10
Test Firsts/ Routes Second
4
Data Link Connection Identifier

22. What does the back bone router do?
Connects the different areas
15.....16 hops and the interface is down
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
110

23. Describe an Outbound ACL
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Advertised Distance & Feasible distance
Unspecified
100Mb/s

24. Spanning-Tree cost of 19
100Mb/s
Multicast
120
Individual or group IP's

25. How does Link-State work?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Port based
Each router builds a map of the network and determines the shortest path to every network.
TRUE

26. What is ::
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Unspecified
2^n-2
The lower MAC address

27. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
Ever 2 seconds
Unicast - Multicast - Anycast
Every 30 Seconds

28. What two things need to be done to enable dynamic routing?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
30-50 seconds
Select the routing protocol - then specify the network.
TRUE

29. The advantages of VLSM
Maximizing address efficiency - organization - summarization
Autonomous System
The lower MAC address
224.0.0.10

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

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31. What two parameters does EIGRP use to determine the best route?
Advertised Distance & Feasible distance
Link-State
Connects the different areas
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration

32. By default OSPF uses what type of authentication?
10Mb/s
110
Null
Select the routing protocol - then specify the network.

33. How do you configure OSPF
2^n-2
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Associating the network address with a local DLCI.
Test Firsts/ Routes Second

34. Can a Router exchange routing information if they are using different Routing Protocols?
Packet Header
No
Determines the cost which is the bandwidth
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

35. Benefits of OSPF?
The Root bridge is the bridge with the lowest bridge ID
Scalable and fast convergence
By DLCI's
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

36. Summarization of network information usually occurs where?
Between areas?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
The inverse of a subnet mask.
Packets are processed before they are routed to an outbound interface.

37. Routing protocol is what?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Every 10 seconds
A protocol on how to communicate with other routers
Checks the source and destination address then permits or denies specific protocols

38. What is OSPF multicast address?
224.0.0.5
Private: link local
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Unspecified

39. How often are OSPF hello packets sent out?
Every 10 seconds
Reduce the link-state database and routing table
30-50 seconds
Each router builds a map of the network and determines the shortest path to every network.

40. What is the default for equal cost paths for load balancing with OSPF?
...
32768
4
For line vty 0 4

41. Static VLAN is what?
To reduce OSPF traffic
4
Port based
0

42. Can you delete individual entries in a specific ACL?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Only with Cisco IOS software release 12.3 (2) T
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Area Border Router

43. The time delay for a router to match a network change?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
30-50 seconds
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Convergence

44. How do you apply the ACL to an interface
Every 30 Seconds
Checks the source and destination address then permits or denies specific protocols
15.....16 hops and the interface is down
Make sure you are in interface mode - then use this command ip access-group 1 out/in

45. Formula for determining hosts
EIGRP - OSPF - RIP
2^n-2
Private: link local
TRUE

46. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
4
Different Autonomous Systems
It is the signaling standard that maintains connection and statues between the DCE and DTE
The lower MAC address

47. OSPF routes packets within a single?
Autonomous System
EIGRP - OSPF - RIP
Plaintext and MD5
1.) Enter the Routing Manually 2.) Use Dymamic Routing

48. What is prefix length?
Advertised Distance & Feasible distance
Bandwidth & Delay
Aka Subnet mask
0

49. What is one to nearest
2^n-2
IETF
MD5 and you have to enable it if you want to use it.
Anycast

50. What does EIGRP use to calculate it's metric?
Six equal cost paths
20 seconds: 10 missed BPDU's
Bandwidth & Delay
Determines the cost which is the bandwidth

Can you answer 50 questions in 15 minutes?

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