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CCNA

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. How does an outbound ACL work?
Routes First/ Tests second
Unicast - Multicast - Anycast
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
DROTHER

2. What is prefix length?
120
Aka Subnet mask
The Diffusing Update Algorithm (DUAL)
MD5 and you have to enable it if you want to use it.

3. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
The Root bridge is the bridge with the lowest bridge ID
Data Link Connection Identifier
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.
30-50 seconds

4. What type of algorithm does RIP use?
MAC based
Distance Vector
4
224.0.0.5

5. How are Frame Relay Circuits identified?

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6. What are non designated routers called?
224.0.0.10
A protocol on how to communicate with other routers
DROTHER
1.) Enter the Routing Manually 2.) Use Dymamic Routing

7. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
The lower MAC address
It combines the advantages of Link-State and Distance vector routing protocols.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
20 seconds: 10 missed BPDU's

8. Routing protocol is what?
Propagation of partial updates that are sent only to those routers that the changes affect.
A protocol on how to communicate with other routers
4 times the hello interval
No

9. Explain OSPF

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10. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
A trunk
View
Only with Cisco IOS software release 12.3 (2) T
The update only includes info about the route change

11. Summarization of network information usually occurs where?
Checks the source and destination address then permits or denies specific protocols
Plaintext and MD5
Between areas?
Supports both unequal metric load balancing and equal metric balancing.

12. What type of algorithm does EIGRP use?
Advance Distance Vector
No
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Test Firsts/ Routes Second

13. What is the default for equal cost paths for load balancing with OSPF?
4
It is the signaling standard that maintains connection and statues between the DCE and DTE
Only with Cisco IOS software release 12.3 (2) T
RIPv2 & EIGRP

14. Who designed OSPF?
IETF
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Designated Router (DR) and a Back-up designated Router (BDR)
RIPv2 & EIGRP

15. What does a trunk do?

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16. How is an EUI-64 format interface ID created from a 48-Bit MAC address
Ever 2 seconds
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
A trunk
Unspecified

17. An autonomous system could also be referred to as what?
The inverse of a subnet mask.
Domain
Data Link Connection Identifier
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.

18. In regards to ACL's What are the three protocols?
A protocol on how to communicate with other routers
A link is an interface on a router
One ACL per protocol - One ACL per direction - Once ACL per interface
MAC based

19. An OSPF neighbor relationship can also be called what?
Adjacency
Different Autonomous Systems
Only with Cisco IOS software release 12.3 (2) T
Make sure you are in interface mode - then use this command ip access-group 1 out/in

20. What is a VLAN
Telnet connectivity - authentication and extended ACLs
To select the best path to the destination
A group of end stations with a common set of requirements - independent of their physical location
Make sure you are in interface mode - then use this command ip access-group 1 out/in

21. What is an ABR
Multiple virtual interfaces that are associated with one physical interface
Dijkstra's Algorithm
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Area Border Router

22. What two parameters does EIGRP use to determine the best route?
0
EIGRP - OSPF - RIP
...
Advertised Distance & Feasible distance

23. How does an Extended ACL work?
Adjacency
Supports both unequal metric load balancing and equal metric balancing.
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Checks the source and destination address then permits or denies specific protocols

24. The advantages of VLSM
Only topology within their respective area.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Automatically
Maximizing address efficiency - organization - summarization

25. What is the Wildcard mask
Plaintext and MD5
The inverse of a subnet mask.
It combines the advantages of Link-State and Distance vector routing protocols.
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

26. How long is the dead interval
No
4 times the hello interval
Distance Vector
Multicast

27. What are two OSPF authentication methods?
View
Packets are processed before they are routed to an outbound interface.
Plaintext and MD5
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

28. The time delay for a router to match a network change?
Unicast - Multicast - Anycast
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Convergence

29. For an adjacency to occur what do the routers have to agree on?
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Connects the different areas
EIGRP - OSPF - RIP
Multiple virtual interfaces that are associated with one physical interface

30. Admin distance of RIPv2
Ever 2 seconds
Domain
Reduce the link-state database and routing table
120

31. What type of authentication does EIGRP use?
20 seconds: 10 missed BPDU's
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Unspecified
MD5 and you have to enable it if you want to use it.

32. What do area's do?
...
Advertised Distance & Feasible distance
Reduce the link-state database and routing table
Packets are processed before they are routed to an outbound interface.

33. In Link state terminology - What is a link?
A link is an interface on a router
Autonomous System
Maximizing address efficiency - organization - summarization
For line vty 0 4

34. How often are periodic updates sent out via RIP
Multicast
RIPv2 & EIGRP
Routes First/ Tests second
Every 30 Seconds

35. Formula for determining hosts
2^n-2
Link-State
Disable auto summarization
Every 5 seconds

36. Example of a Routing Protocol?
MD5 and you have to enable it if you want to use it.
EIGRP - OSPF - RIP
10Mb/s
To reduce OSPF traffic

37. Admin distance of a Static Route?
4
Layers 1 & 2
Telnet connectivity - authentication and extended ACLs
1

38. In regards to troubleshooting OSPF what should you check?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
For line vty 0 4
Packets are processed before they are routed to an outbound interface.
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

39. Describe features of RIPv2
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
The inverse of a subnet mask.
Test Firsts/ Routes Second
Each router builds a map of the network and determines the shortest path to every network.

40. Problem with static routes
Not scalable - hard to maintain as the network grows
TRUE
0
The update only includes info about the route change

41. Describe features of RIPv1
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Adjacency
A trunk
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.

42. What does the back bone router do?
Connects the different areas
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Associating the network address with a local DLCI.
A backbone area...Also known as Area 0

43. What does partial refer to?
Maximizing address efficiency - organization - summarization
RIPv2 & EIGRP
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
The update only includes info about the route change

44. What type of algorithm does OSPF & IS-IS use?
Link-State
Aka Subnet mask
Automatically
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

45. What is OSPF multicast address?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Packet Header
224.0.0.5
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.

46. What does DLCI stand for?
Data Link Connection Identifier
0
It is never useful to send information about a route back in the direction from which the original info came.
Test Firsts/ Routes Second

47. Admin distance of OSPF?
Unspecified
110
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
The Diffusing Update Algorithm (DUAL)

48. Describe an Outbound ACL
Anycast
Checks the source address and then permits or denies the entire protocol suite
It is never useful to send information about a route back in the direction from which the original info came.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

49. Max_age time for BPDU's

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50. What is the multicast address for EIGRP?
Anycast
224.0.0.10
Automatically
To select the best path to the destination

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