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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. What two classless protocols act classful by default?
Packet Header
RIPv2 & EIGRP
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.
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

2. A router running EIGRP will store what?
Private: link local
All backup routes for destinations.
Select the routing protocol - then specify the network.
Individual or group IP's

3. What do you need to do if there are discontigous networks with EIGRP?
20 seconds: 10 missed BPDU's
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Disable auto summarization
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

4. Admin distance of EIGRP?
90
Every 30 minutes by default
Ever 2 seconds
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

5. How does EIGRP work with regards to Load Balancing
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Every 30 minutes by default
Supports both unequal metric load balancing and equal metric balancing.
The Diffusing Update Algorithm (DUAL)

6. How do you configure a sub interface?
A group of end stations with a common set of requirements - independent of their physical location
Loopback
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
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.

7. Benefits of OSPF?
0
Every 30 minutes by default
Scalable and fast convergence
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

8. What is the default load balancing for RIP
4
Not scalable - hard to maintain as the network grows
For line vty 0 4
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.

9. The time delay for a router to match a network change?
Between areas?
Port based
Convergence
TRUE

10. Formula for determining hosts
It combines the advantages of Link-State and Distance vector routing protocols.
Bandwidth & Delay
2^n-2
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

11. What Layer does Frame Relay operate at?
Cisco - ANSI - Q.933A
Because a loopback interface is always active and cannot be in a down state like a real interface can.
16
Layers 1 & 2

12. How long is the dead interval
Private: link local
Distance Vector
Make sure you are in interface mode - then use this command ip access-group 1 out/in
4 times the hello interval

13. Exterior Gateway Protocols are designed for use between
Every 30 Seconds
Different Autonomous Systems
0
Private: link local

14. Spanning-Tree cost of 19
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
100Mb/s
Multicast
Packets are processed before they are routed to an outbound interface.

15. In regards to ACL's What are the three protocols?
One ACL per protocol - One ACL per direction - Once ACL per interface
Anycast
Supports both unequal metric load balancing and equal metric balancing.
Multicast

16. What is ::1
Packet Header
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.
A combination of Link-state and distance vector
Loopback

17. Who designed OSPF?
RIPv2 & EIGRP
A group of end stations with a common set of requirements - independent of their physical location
IETF
A combination of Link-state and distance vector

18. Normal time for STP convergence
30-50 seconds
Test Firsts/ Routes Second
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Associating the network address with a local DLCI.

19. What does partial refer to?
To select the best path to the destination
Distance Vector
The update only includes info about the route change
Checks the source and destination address then permits or denies specific protocols

20. Describe a Inbound ACL
Dijkstra's Algorithm
Disable auto summarization
Packets are processed before they are routed to an outbound interface.
2^n-2

21. What distant vector protocols exhibit classless behavior?
Multiple virtual interfaces that are associated with one physical interface
To select the best path to the destination
RIPv2 and EIGRP
Each router builds a map of the network and determines the shortest path to every network.

22. Rip is capable of load balancing over as many as?
Scalable and fast convergence
Ever 2 seconds
Aka Subnet mask
Six equal cost paths

23. What does a trunk do?

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24. For a VLAN to span across multiple switches What is required?
To select the best path to the destination
Only topology within their respective area.
The lower MAC address
A trunk

25. What are two statements that are true of IPv6 address representation?
Different Autonomous Systems
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Port based
Only with Cisco IOS software release 12.3 (2) T

26. Every ACL will need what?
Cisco - ANSI - Q.933A
A permit statement
MD5 and you have to enable it if you want to use it.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

27. How often does a router send link-state advertisements?
Every 30 minutes by default
Routes First/ Tests second
It is never useful to send information about a route back in the direction from which the original info came.
Checks the source and destination address then permits or denies specific protocols

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

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29. What does DLCI stand for?
Data Link Connection Identifier
...
Propagation of partial updates that are sent only to those routers that the changes affect.
110

30. Wildcard masks filter

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31. What is a VLAN
IP
A group of end stations with a common set of requirements - independent of their physical location
MD5 and you have to enable it if you want to use it.
Susceptible to routing loops

32. Example of a Routing Protocol?
4
Layers 1 & 2
EIGRP - OSPF - RIP
Telnet connectivity - authentication and extended ACLs

33. OSPF will elect a what?
It is never useful to send information about a route back in the direction from which the original info came.
IP
Aka Subnet mask
Designated Router (DR) and a Back-up designated Router (BDR)

34. How is an EUI-64 format interface ID created from a 48-Bit MAC address
RIPv2 & EIGRP
Associating the network address with a local DLCI.
A layer 3 switch or router
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

35. What is OSPF multicast address?
...
16
224.0.0.5
100Mb/s

36. What are the three LMI standards
Automatically
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.
20 seconds: 10 missed BPDU's
Cisco - ANSI - Q.933A

37. Describe features of RIPv2
Routes First/ Tests second
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Adjacency

38. Summarization of network information usually occurs where?
MD5 and you have to enable it if you want to use it.
Between areas?
Propagation of partial updates that are sent only to those routers that the changes affect.
It is the signaling standard that maintains connection and statues between the DCE and DTE

39. Static VLAN is what?
4
Dijkstra's Algorithm
Link-State
Port based

40. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
A backbone area...Also known as Area 0
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
The lower MAC address
Propagation of partial updates that are sent only to those routers that the changes affect.

41. The no auto-summary command does what?
Link-State
2^n-2
The inverse of a subnet mask.
Forces protocols to behave as if they were classless

42. With OSPF - what must be defined?
TRUE
Associating the network address with a local DLCI.
A backbone area...Also known as Area 0
Private: link local

43. Explain OSPF

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44. Classful Protocols summarize
IP
16
Automatically
IETF

45. What is ::
Unspecified
Every 30 minutes by default
Area Border Router
One ACL per protocol - One ACL per direction - Once ACL per interface

46. What does EIGRP use to calculate it's metric?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Bandwidth & Delay
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Only topology within their respective area.

47. Routers are used for what?
To select the best path to the destination
IP
Autonomous System
Forces protocols to behave as if they were classless

48. In regards to troubleshooting OSPF what should you check?
For line vty 0 4
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Null
View

49. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
224.0.0.5
0
TRUE
Between areas?

50. Why is it important to have a loopback address when using OSPF?
Checks the source address and then permits or denies the entire protocol suite
Because a loopback interface is always active and cannot be in a down state like a real interface can.
A layer 3 switch or router
A link is an interface on a router

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