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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. The time delay for a router to match a network change?
Aka Subnet mask
The Diffusing Update Algorithm (DUAL)
Convergence
Automatically

2. What two parameters does EIGRP use to determine the best route?
The lower MAC address
It is the signaling standard that maintains connection and statues between the DCE and DTE
Area Border Router
Advertised Distance & Feasible distance

3. What distant vector protocols exhibit classless behavior?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
RIPv2 and EIGRP
2^n-2

4. A router running EIGRP will store what?
EIGRP - OSPF - RIP
Because a loopback interface is always active and cannot be in a down state like a real interface can.
All backup routes for destinations.
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

5. In frame relay What is Inverse Arp
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
Associating the network address with a local DLCI.
A group of end stations with a common set of requirements - independent of their physical location
1

6. Exterior Gateway Protocols are designed for use between
Designated Router (DR) and a Back-up designated Router (BDR)
Different Autonomous Systems
IETF
A combination of Link-state and distance vector

7. What is the Wildcard mask
The inverse of a subnet mask.
1Gb/s
Advertised Distance & Feasible distance
Cisco - ANSI - Q.933A

8. When do you use Access-Class
Checks the source address and then permits or denies the entire protocol suite
Forces protocols to behave as if they were classless
For line vty 0 4
Area Border Router

9. What does the back bone router do?
15.....16 hops and the interface is down
Connects the different areas
Select the routing protocol - then specify the network.
A backbone area...Also known as Area 0

10. The no auto-summary command does what?
Forces protocols to behave as if they were classless
MD5 and you have to enable it if you want to use it.
Domain
...

11. Who designed OSPF?
IETF
Null
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.
Maximizing address efficiency - organization - summarization

12. Advance Distance Vector or Hybrid uses what?
2^n-2
A combination of Link-state and distance vector
Packets are processed before they are routed to an outbound interface.
Connects the different areas

13. What is one to many?
4 times the hello interval
Between areas?
Multicast
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

14. What does bounded refer to?
TRUE
Test Firsts/ Routes Second
Designated Router (DR) and a Back-up designated Router (BDR)
Propagation of partial updates that are sent only to those routers that the changes affect.

15. By default OSPF uses what type of authentication?
Inter-VLAN routing
To select the best path to the destination
MAC based
Null

16. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Connects the different areas
16
...
Every 30 minutes by default

17. Admin distance of OSPF?
110
The Root bridge is the bridge with the lowest bridge ID
Carry's traffic for multiple VLANS
Updates all DROTHER Routers when a change occurs

18. What is the multicast address for EIGRP?
It is never useful to send information about a route back in the direction from which the original info came.
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 group of end stations with a common set of requirements - independent of their physical location
224.0.0.10

19. 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.
Updates all DROTHER Routers when a change occurs
A protocol on how to communicate with other routers

20. How does the SPF determine the shortest path?
Determines the cost which is the bandwidth
2^n-2
Convergence
Private: link local

21. What two things need to be done to enable dynamic routing?
0
224.0.0.10
Carry's traffic for multiple VLANS
Select the routing protocol - then specify the network.

22. How often are periodic updates sent out via RIP
10Mb/s
View
Only topology within their respective area.
Every 30 Seconds

23. Describe an Outbound ACL
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
2^n-2
30-50 seconds
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

24. Explain OSPF

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25. An autonomous system could also be referred to as what?
Test Firsts/ Routes Second
Domain
90
Packets are processed before they are routed to an outbound interface.

26. What is the default load balancing for RIP
MAC based
4
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication

27. What is needed to pass traffic from one VLAN to another?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
15.....16 hops and the interface is down
Multicast
A layer 3 switch or router

28. Example of a Routing Protocol?
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
EIGRP - OSPF - RIP
Every 30 minutes by default
It combines the advantages of Link-State and Distance vector routing protocols.

29. VTP Transparent Mode does what?

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30. Break down the word Link-State

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31. Describe features of RIPv2
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Layers 1 & 2
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
1Gb/s

32. Dynamic ACL's are dependent on what?
Every 10 seconds
Data Link Connection Identifier
Telnet connectivity - authentication and extended ACLs
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.

33. What is an ABR
2^n-2
Loopback
Area Border Router
Automatically

34. What is a VLAN
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Advertised Distance & Feasible distance
Every 10 Seconds
A group of end stations with a common set of requirements - independent of their physical location

35. With OSPF - there must always be a area......
0
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Every 30 minutes by default

36. What are two OSPF authentication methods?
IP
Checks the source address and then permits or denies the entire protocol suite
Port based
Plaintext and MD5

37. What type of algorithm does EIGRP use?
Disable auto summarization
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Every 30 minutes by default
Advance Distance Vector

38. Spanning-Tree cost of 19
The inverse of a subnet mask.
One ACL per protocol - One ACL per direction - Once ACL per interface
100Mb/s
Anycast

39. Normal time for STP convergence
Only with Cisco IOS software release 12.3 (2) T
A backbone area...Also known as Area 0
30-50 seconds
Test Firsts/ Routes Second

40. What do area's do?
100Mb/s
0
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Reduce the link-state database and routing table

41. What is passing VLAN traffic to another called?
Inter-VLAN routing
Dijkstra's Algorithm
To select the best path to the destination
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers

42. An OSPF neighbor relationship can also be called what?
...
Routes First/ Tests second
Adjacency
Individual or group IP's

43. What type of algorithm does RIP use?
1
Distance Vector
The Root bridge is the bridge with the lowest bridge ID
MAC based

44. Purpose of a Routing Protocol?
Select the routing protocol - then specify the network.
Scalable and fast convergence
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
90

45. In regards to troubleshooting OSPF what should you check?
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Every 10 seconds
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
1.) Enter the Routing Manually 2.) Use Dymamic Routing

46. How does EIGRP work with regards to Load Balancing
Multicast
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Bandwidth & Delay
Supports both unequal metric load balancing and equal metric balancing.

47. The AS number must what?
Supports both unequal metric load balancing and equal metric balancing.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Match on all routers or it will not work
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers

48. How often are OSPF hello packets sent out?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Every 10 seconds
Null
MD5 and you have to enable it if you want to use it.

49. Summarization of network information usually occurs where?
Between areas?
Designated Router (DR) and a Back-up designated Router (BDR)
The Diffusing Update Algorithm (DUAL)
Forces protocols to behave as if they were classless

50. How do you apply the ACL to an interface
Every 10 seconds
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Plaintext and MD5
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

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