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CCNA

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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1. In Link state terminology - What is a link?
For line vty 0 4
The Root bridge is the bridge with the lowest bridge ID
Packet Header
A link is an interface on a router

2. For a VLAN to span across multiple switches What is required?
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
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 trunk
Maximizing address efficiency - organization - summarization

3. Admin distance of OSPF?
A layer 3 switch or router
110
The lower MAC address
A trunk

4. The time delay for a router to match a network change?
Convergence
32768
A protocol on how to communicate with other routers
Designated Router (DR) and a Back-up designated Router (BDR)

5. What two classless protocols act classful by default?
Unspecified
Ever 2 seconds
Private: link local
RIPv2 & EIGRP

6. OSPF will elect a what?
Between areas?
32768
Multiple virtual interfaces that are associated with one physical interface
Designated Router (DR) and a Back-up designated Router (BDR)

7. What is the dead interval
Six equal cost paths
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Individual or group IP's
Each router builds a map of the network and determines the shortest path to every network.

8. Classful Protocols summarize
RIPv2 and EIGRP
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Automatically
Determines the cost which is the bandwidth

9. How is an EUI-64 format interface ID created from a 48-Bit MAC address
The update only includes info about the route change
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Different Autonomous Systems
Every 30 Seconds

10. How does EIGRP work with regards to Load Balancing
EIGRP - OSPF - RIP
Supports both unequal metric load balancing and equal metric balancing.
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication

11. What type of authentication does EIGRP use?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
All backup routes for destinations.
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
MD5 and you have to enable it if you want to use it.

12. What is the purpose of LMI
Distance Vector
One ACL per protocol - One ACL per direction - Once ACL per interface
It is the signaling standard that maintains connection and statues between the DCE and DTE
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

13. Nonbackbone - internal routers are aware of what topology
120
Only topology within their respective area.
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
1

14. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Multiple virtual interfaces that are associated with one physical interface
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.
4
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

15. An autonomous system could also be referred to as what?
Domain
Every 10 seconds
Updates all DROTHER Routers when a change occurs
Automatically

16. Why is it important to have a loopback address when using OSPF?
Aka Subnet mask
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Associating the network address with a local DLCI.
Carry's traffic for multiple VLANS

17. What algorithm does EIGRP use?
Aka Subnet mask
Domain
The Diffusing Update Algorithm (DUAL)
120

18. What is passing VLAN traffic to another called?
Domain
MAC based
Inter-VLAN routing
Only with Cisco IOS software release 12.3 (2) T

19. An OSPF neighbor relationship can also be called what?
Loopback
IETF
The Root bridge is the bridge with the lowest bridge ID
Adjacency

20. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
By DLCI's
Checks the source address and then permits or denies the entire protocol suite
IETF
The lower MAC address

21. What does EIGRP use to calculate it's metric?
Bandwidth & Delay
Checks the source address and then permits or denies the entire protocol suite
30-50 seconds
Forces protocols to behave as if they were classless

22. With OSPF - what must be defined?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Dijkstra's Algorithm
A backbone area...Also known as Area 0
16

23. Problem with RIP
224.0.0.5
Susceptible to routing loops
Every 10 Seconds
Different Autonomous Systems

24. By default OSPF uses what type of authentication?
MD5 and you have to enable it if you want to use it.
110
Null
Advertised Distance & Feasible distance

25. Normal time for STP convergence
30-50 seconds
The Diffusing Update Algorithm (DUAL)
The lower MAC address
Convergence

26. Describe an Outbound ACL
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
0
Area Border Router
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

27. Who designed OSPF?
IETF
Carry's traffic for multiple VLANS
DROTHER
Autonomous System

28. What does bounded refer to?
Multicast
Packet Header
Propagation of partial updates that are sent only to those routers that the changes affect.
Each router builds a map of the network and determines the shortest path to every network.

29. Can you delete individual entries in a specific ACL?
Only with Cisco IOS software release 12.3 (2) T
Advance Distance Vector
Different Autonomous Systems
100Mb/s

30. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Every 30 Seconds
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Every 10 Seconds
View

31. What address is FE80:/10
Private: link local
Unspecified
Data Link Connection Identifier
Scalable and fast convergence

32. What is the default Bridge priority?
IETF
Only topology within their respective area.
A layer 3 switch or router
32768

33. What is one to many?
Multicast
Unspecified
Cisco - ANSI - Q.933A
Supports both unequal metric load balancing and equal metric balancing.

34. Benefits of OSPF?
Scalable and fast convergence
Only topology within their respective area.
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

35. In regards to troubleshooting OSPF what should you check?
30-50 seconds
To reduce OSPF traffic
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
View

36. When do you use Access-Class
Reduce the link-state database and routing table
For line vty 0 4
Every 30 Seconds
Routes First/ Tests second

37. Admin distance of a connected Network?
A trunk
0
4
15.....16 hops and the interface is down

38. How often are periodic updates sent out via RIP
Only topology within their respective area.
0
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Every 30 Seconds

39. How does an outbound ACL work?
Checks the source address and then permits or denies the entire protocol suite
Routes First/ Tests second
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Adjacency

40. How do you apply the ACL to an interface
Routes First/ Tests second
4
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Make sure you are in interface mode - then use this command ip access-group 1 out/in

41. What are the major components of OSPF troubleshooting?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Advertised Distance & Feasible distance
One ACL per protocol - One ACL per direction - Once ACL per interface

42. Dynamic VLAN is what?
Packets are processed before they are routed to an outbound interface.
Unspecified
MAC based
No

43. How are Frame Relay Circuits identified?

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44. Problem with static routes
Every 5 seconds
Every 10 Seconds
A combination of Link-state and distance vector
Not scalable - hard to maintain as the network grows

45. Rip is capable of load balancing over as many as?
32768
EIGRP - OSPF - RIP
Each router builds a map of the network and determines the shortest path to every network.
Six equal cost paths

46. What Layer does Frame Relay operate at?
Associating the network address with a local DLCI.
MD5 and you have to enable it if you want to use it.
Layers 1 & 2
The Diffusing Update Algorithm (DUAL)

47. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
RIPv2 and EIGRP
Loopback
Aka Subnet mask
16

48. What type of algorithm does OSPF & IS-IS use?
A permit statement
Reduce the link-state database and routing table
Link-State
Every 30 Seconds

49. Example of a Routed Protocol?
Every 10 Seconds
10Mb/s
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
IP

50. What is an Autonomous System?
RIPv2 and EIGRP
...
Every 5 seconds
TRUE

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