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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. Benefits of OSPF?
Scalable and fast convergence
Disable auto summarization
Associating the network address with a local DLCI.
For line vty 0 4

2. How does an Extended ACL work?
0
IP
Connects the different areas
Checks the source and destination address then permits or denies specific protocols

3. With ACL's where does the router extract information
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Every 5 seconds
Packet Header
The Diffusing Update Algorithm (DUAL)

4. Static VLAN is what?
Port based
Packet Header
Link-State
The update only includes info about the route change

5. Explain OSPF

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6. Who designed OSPF?
0
IETF
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Advertised Distance & Feasible distance

7. How do you configure a sub interface?
To select the best path to the destination
90
It combines the advantages of Link-State and Distance vector routing protocols.
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

8. What is one to many?
Multicast
Propagation of partial updates that are sent only to those routers that the changes affect.
Test Firsts/ Routes Second
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.

9. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
Port based
TRUE
1.) Enter the Routing Manually 2.) Use Dymamic Routing
2^n-2

10. What is a VLAN
Area Border Router
16
224.0.0.5
A group of end stations with a common set of requirements - independent of their physical location

11. Explain how routing loops occur with RIP?
...
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Six equal cost paths
It combines the advantages of Link-State and Distance vector routing protocols.

12. Summarization of network information usually occurs where?
90
Between areas?
IP
Susceptible to routing loops

13. What two classless protocols act classful by default?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Inter-VLAN routing
RIPv2 & EIGRP
To reduce OSPF traffic

14. Spanning-Tree cost of 100
Aka Subnet mask
10Mb/s
15.....16 hops and the interface is down
Designated Router (DR) and a Back-up designated Router (BDR)

15. How often are OSPF hello packets sent out?
90
Every 10 seconds
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Only topology within their respective area.

16. What is an ABR
Data Link Connection Identifier
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Every 30 Seconds
Area Border Router

17. Can a Router exchange routing information if they are using different Routing Protocols?
Aka Subnet mask
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
No
120

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

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19. What does DLCI stand for?
TRUE
Aka Subnet mask
Data Link Connection Identifier
It is never useful to send information about a route back in the direction from which the original info came.

20. What does the DR do?
Every 10 Seconds
4
Only topology within their respective area.
Updates all DROTHER Routers when a change occurs

21. Problem with static routes
All backup routes for destinations.
RIPv2 and EIGRP
Not scalable - hard to maintain as the network grows
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.

22. How does a Standard ACL work?
Checks the source address and then permits or denies the entire protocol suite
To select the best path to the destination
A permit statement
Select the routing protocol - then specify the network.

23. Routers are used for what?
4 times the hello interval
To select the best path to the destination
Make sure you are in interface mode - then use this command ip access-group 1 out/in
The Root bridge is the bridge with the lowest bridge ID

24. What is needed to pass traffic from one VLAN to another?
For line vty 0 4
120
Six equal cost paths
A layer 3 switch or router

25. The advantages of VLSM
Every 30 minutes by default
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Maximizing address efficiency - organization - summarization
Individual or group IP's

26. How does an outbound ACL work?
Checks the source and destination address then permits or denies specific protocols
Routes First/ Tests second
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Cisco - ANSI - Q.933A

27. Describe an Outbound ACL
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Checks the source and destination address then permits or denies specific protocols
A trunk
2^n

28. What does EIGRP use to calculate it's metric?
To reduce OSPF traffic
DROTHER
Bandwidth & Delay
Connects the different areas

29. How often does EIGRP send hellow packets?
0
The update only includes info about the route change
Every 5 seconds
Autonomous System

30. Formula for determining Subnets
Checks the source and destination address then permits or denies specific protocols
Area Border Router
2^n
IETF

31. Purpose of a Routing Protocol?
A layer 3 switch or router
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
1
Test Firsts/ Routes Second

32. How does EIGRP work with regards to Load Balancing
Aka Subnet mask
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Supports both unequal metric load balancing and equal metric balancing.
A layer 3 switch or router

33. What address is FE80:/10
Routes First/ Tests second
Private: link local
4 times the hello interval
Make sure you are in interface mode - then use this command ip access-group 1 out/in

34. What does a trunk do?

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35. Describe features of RIPv1
Forces protocols to behave as if they were classless
Checks the source address and then permits or denies the entire protocol suite
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
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

36. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
A backbone area...Also known as Area 0
Every 30 minutes by default
No
The lower MAC address

37. In frame relay What is Inverse Arp
4
Associating the network address with a local DLCI.
Maximizing address efficiency - organization - summarization
By DLCI's

38. The time delay for a router to match a network change?
Every 10 Seconds
Convergence
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
All backup routes for destinations.

39. Advance Distance Vector or Hybrid uses what?
Dijkstra's Algorithm
A combination of Link-state and distance vector
Designated Router (DR) and a Back-up designated Router (BDR)
IP

40. What Layer does Frame Relay operate at?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Layers 1 & 2
The inverse of a subnet mask.
All backup routes for destinations.

41. Routing protocol is what?
32768
A protocol on how to communicate with other routers
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
Layers 1 & 2

42. Example of a Routing Protocol?
Six equal cost paths
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
...
EIGRP - OSPF - RIP

43. What type of algorithm does EIGRP use?
A layer 3 switch or router
100Mb/s
Advance Distance Vector
Only topology within their respective area.

44. Why is this done?
Test Firsts/ Routes Second
IETF
To reduce OSPF traffic
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.

45. What type of authentication does EIGRP use?
Cisco - ANSI - Q.933A
MD5 and you have to enable it if you want to use it.
Layers 1 & 2
RIPv2 and EIGRP

46. How many hops are allowed with RIP?
Maximizing address efficiency - organization - summarization
15.....16 hops and the interface is down
...
Different Autonomous Systems

47. For a VLAN to span across multiple switches What is required?
A trunk
A group of end stations with a common set of requirements - independent of their physical location
Null
Not scalable - hard to maintain as the network grows

48. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
TRUE
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.
Telnet connectivity - authentication and extended ACLs

49. VTP Transparent Mode does what?

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50. A router running EIGRP will store what?
Scalable and fast 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.
Aka Subnet mask
All backup routes for destinations.

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