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CCNA

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. Dynamic ACL's are dependent on what?
Telnet connectivity - authentication and extended ACLs
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
To reduce OSPF traffic
Packet Header

2. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
DROTHER
224.0.0.5

3. How long is the dead interval
Every 10 seconds
Ever 2 seconds
4 times the hello interval
All backup routes for destinations.

4. Purpose of a Routing Protocol?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Test Firsts/ Routes Second
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Checks the source address and then permits or denies the entire protocol suite

5. Static VLAN is what?
Associating the network address with a local DLCI.
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
A trunk
Port based

6. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Automatically
90
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

7. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Multiple virtual interfaces that are associated with one physical interface
View
Every 10 seconds
Make sure you are in interface mode - then use this command ip access-group 1 out/in

8. What does the back bone router do?
Only topology within their respective area.
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Connects the different areas

9. In frame relay What is Inverse Arp
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
...
Area Border Router
Associating the network address with a local DLCI.

10. Admin distance of EIGRP?
A group of end stations with a common set of requirements - independent of their physical location
90
Every 30 Seconds
Layers 1 & 2

11. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
Private: link local
TRUE
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Reduce the link-state database and routing table

12. Describe a Inbound ACL
It is never useful to send information about a route back in the direction from which the original info came.
Packets are processed before they are routed to an outbound interface.
A trunk
Match on all routers or it will not work

13. The no auto-summary command does what?
Forces protocols to behave as if they were classless
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
A layer 3 switch or router
The update only includes info about the route change

14. What are the three LMI standards
100Mb/s
Designated Router (DR) and a Back-up designated Router (BDR)
Cisco - ANSI - Q.933A
Select the routing protocol - then specify the network.

15. Why is it important to have a loopback address when using OSPF?
0
Determines the cost which is the bandwidth
2^n-2
Because a loopback interface is always active and cannot be in a down state like a real interface can.

16. How does an outbound ACL work?
All backup routes for destinations.
Checks the source address and then permits or denies the entire protocol suite
Every 5 seconds
Routes First/ Tests second

17. Advance Distance Vector or Hybrid uses what?
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
2^n
10Mb/s
A combination of Link-state and distance vector

18. What is the Shortest Path First algorithm also called?

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19. How does inbound ACL work?
Carry's traffic for multiple VLANS
Anycast
Test Firsts/ Routes Second
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

20. How do you configure OSPF
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
15.....16 hops and the interface is down
It is never useful to send information about a route back in the direction from which the original info came.
Scalable and fast convergence

21. How does Link-State work?
MAC based
The lower MAC address
Each router builds a map of the network and determines the shortest path to every network.
One ACL per protocol - One ACL per direction - Once ACL per interface

22. What is OSPF multicast address?
Convergence
Updates all DROTHER Routers when a change occurs
224.0.0.5
Match on all routers or it will not work

23. Exterior Gateway Protocols are designed for use between
224.0.0.5
Different Autonomous Systems
2^n-2
A trunk

24. How often are OSPF hello packets sent out?
Test Firsts/ Routes Second
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Every 10 seconds
224.0.0.5

25. With ACL's where does the router extract information
Packet Header
2^n-2
The inverse of a subnet mask.
Between areas?

26. What type of algorithm does RIP use?
Distance Vector
4
4
Advance Distance Vector

27. VTP Server Mode does what?

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28. Why is this done?
Not scalable - hard to maintain as the network grows
To reduce OSPF traffic
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Updates all DROTHER Routers when a change occurs

29. What is ::1
One ACL per protocol - One ACL per direction - Once ACL per interface
Loopback
30-50 seconds
All backup routes for destinations.

30. When do you use Access-Class
By DLCI's
A backbone area...Also known as Area 0
Six equal cost paths
For line vty 0 4

31. What type of algorithm does OSPF & IS-IS use?
Port based
Link-State
224.0.0.10
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.

32. Describe features of RIPv2
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Layers 1 & 2
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Each router builds a map of the network and determines the shortest path to every network.

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

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34. Admin distance of RIPv2
0
120
Only topology within their respective area.
30-50 seconds

35. Classful Protocols summarize
Carry's traffic for multiple VLANS
The Diffusing Update Algorithm (DUAL)
Private: link local
Automatically

36. What are two OSPF authentication methods?
Plaintext and MD5
Designated Router (DR) and a Back-up designated Router (BDR)
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Private: link local

37. Break down the word Link-State

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38. What is the default Bridge priority?
A permit statement
Designated Router (DR) and a Back-up designated Router (BDR)
32768
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.

39. In regards to ACL's What are the three protocols?
Unicast - Multicast - Anycast
RIPv2 and EIGRP
Area Border Router
One ACL per protocol - One ACL per direction - Once ACL per interface

40. What is prefix length?
Aka Subnet mask
MD5 and you have to enable it if you want to use it.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Test Firsts/ Routes Second

41. Example of a Routing Protocol?
EIGRP - OSPF - RIP
Match on all routers or it will not work
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Disable auto summarization

42. How does an Extended ACL work?
IP
Checks the source and destination address then permits or denies specific protocols
4
Autonomous System

43. How is the root bridge determined?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Connects the different areas
Unspecified
The Root bridge is the bridge with the lowest bridge ID

44. Problem with RIP
Susceptible to routing loops
It is never useful to send information about a route back in the direction from which the original info came.
Only topology within their respective area.
Aka Subnet mask

45. What is the dead interval
Different Autonomous Systems
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.
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Plaintext and MD5

46. Who designed OSPF?
4
RIPv2 and EIGRP
IETF
A link is an interface on a router

47. How often are BPDU's sent?
16
Ever 2 seconds
Every 30 Seconds
Forces protocols to behave as if they were classless

48. Spanning-Tree cost of 19
0
...
100Mb/s
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.

49. What is the default load balancing for RIP
4
224.0.0.10
IP
By DLCI's

50. Why is EIGRP considered a Hybrid routing protocol?
A backbone area...Also known as Area 0
It combines the advantages of Link-State and Distance vector routing protocols.
Distance Vector
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.