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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. Formula for determining Subnets
Distance Vector
2^n
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
4

2. Benefits of OSPF?
To select the best path to the destination
4 times the hello interval
0
Scalable and fast convergence

3. With OSPF - there must always be a area......
0
The Diffusing Update Algorithm (DUAL)
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.

4. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
10Mb/s
Each router builds a map of the network and determines the shortest path to every network.
It is the signaling standard that maintains connection and statues between the DCE and DTE
The lower MAC address

5. What is Frame Relay?
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Match on all routers or it will not work
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Not scalable - hard to maintain as the network grows

6. What does a trunk do?

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7. What type of algorithm does EIGRP use?
Advance Distance Vector
Private: link local
Multicast
Advertised Distance & Feasible distance

8. Why is this done?
Unicast - Multicast - Anycast
Forces protocols to behave as if they were classless
To reduce OSPF traffic
Individual or group IP's

9. What three types of IPv6 address types are there?
EIGRP - OSPF - RIP
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
120
Unicast - Multicast - Anycast

10. With ACL's where does the router extract information
Loopback
Packet Header
Match on all routers or it will not work
Carry's traffic for multiple VLANS

11. Static VLAN is what?
Port based
RIPv2 and EIGRP
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Match on all routers or it will not work

12. What two things need to be done to enable dynamic routing?
Distance Vector
The lower MAC address
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Select the routing protocol - then specify the network.

13. What does bounded refer to?
4 times the hello interval
Propagation of partial updates that are sent only to those routers that the changes affect.
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
A layer 3 switch or router

14. Admin distance of a connected Network?
Ever 2 seconds
Carry's traffic for multiple VLANS
0
Loopback

15. How does an Extended ACL work?
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Test Firsts/ Routes Second
Checks the source and destination address then permits or denies specific protocols
Bandwidth & Delay

16. In regards to ACL's What are the three protocols?
One ACL per protocol - One ACL per direction - Once ACL per interface
15.....16 hops and the interface is down
100Mb/s
Test Firsts/ Routes Second

17. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
TRUE
1
30-50 seconds
Telnet connectivity - authentication and extended ACLs

18. Admin distance of OSPF?
Loopback
Susceptible to routing loops
110
Unspecified

19. An OSPF neighbor relationship can also be called what?
Match on all routers or it will not work
Adjacency
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Because a loopback interface is always active and cannot be in a down state like a real interface can.

20. Explain how routing loops occur with RIP?
...
Unicast - Multicast - Anycast
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
The Diffusing Update Algorithm (DUAL)

21. What is the spilt horizon rule?
Advance Distance Vector
Distance Vector
It is never useful to send information about a route back in the direction from which the original info came.
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers

22. How often are LMI's sent out?
Every 10 Seconds
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
4
Convergence

23. Example of a Routing Protocol?
EIGRP - OSPF - RIP
Reduce the link-state database and routing table
Checks the source address and then permits or denies the entire protocol suite
Supports both unequal metric load balancing and equal metric balancing.

24. What are the two ways routers can learn about the destination information?
EIGRP - OSPF - RIP
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
A group of end stations with a common set of requirements - independent of their physical location
1.) Enter the Routing Manually 2.) Use Dymamic Routing

25. A router running EIGRP will store what?
The update only includes info about the route change
To select the best path to the destination
Null
All backup routes for destinations.

26. In frame relay What is Inverse Arp
RIPv2 & EIGRP
Ever 2 seconds
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Associating the network address with a local DLCI.

27. What is an Autonomous System?
120
...
A permit statement
Each router builds a map of the network and determines the shortest path to every network.

28. What two parameters does EIGRP use to determine the best route?
Not scalable - hard to maintain as the network grows
IETF
4
Advertised Distance & Feasible distance

29. In regards to troubleshooting OSPF what should you check?
Loopback
By DLCI's
Telnet connectivity - authentication and extended ACLs
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

30. How do you configure OSPF
20 seconds: 10 missed BPDU's
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Packets are processed before they are routed to an outbound interface.
Plaintext and MD5

31. Every ACL will need what?
By DLCI's
A permit statement
32768
Not scalable - hard to maintain as the network grows

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

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33. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
Only topology within their respective area.
2^n
Packets are processed before they are routed to an outbound interface.

34. What is ::
It combines the advantages of Link-State and Distance vector routing protocols.
Unspecified
Cisco - ANSI - Q.933A
Six equal cost paths

35. Advance Distance Vector or Hybrid uses what?
Multiple virtual interfaces that are associated with one physical 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.
A combination of Link-state and distance vector
120

36. How long is the dead interval
Disable auto summarization
Different Autonomous Systems
4 times the hello interval
IP

37. What is prefix length?
Advance Distance Vector
Aka Subnet mask
All backup routes for destinations.
Autonomous System

38. How many hops are allowed with RIP?
15.....16 hops and the interface is down
Multiple virtual interfaces that are associated with one physical interface
Updates all DROTHER Routers when a change occurs
Checks the source address and then permits or denies the entire protocol suite

39. What do you need to do if there are discontigous networks with EIGRP?
Individual or group IP's
All backup routes for destinations.
Disable auto summarization
Dijkstra's Algorithm

40. With OSPF - what must be defined?
20 seconds: 10 missed BPDU's
Inter-VLAN routing
A backbone area...Also known as Area 0
Individual or group IP's

41. What does partial refer to?
Every 10 Seconds
The update only includes info about the route change
Dijkstra's Algorithm
Designated Router (DR) and a Back-up designated Router (BDR)

42. Example of a Routed Protocol?
2^n
100Mb/s
IP
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

43. Spanning-Tree cost of 100
A protocol on how to communicate with other routers
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
10Mb/s

44. What is one to nearest
Test Firsts/ Routes Second
Anycast
A link is an interface on a router
IP

45. For a VLAN to span across multiple switches What is required?
A trunk
Test Firsts/ Routes Second
100Mb/s
2^n-2

46. How often are OSPF hello packets sent out?
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Every 10 seconds
Scalable and fast convergence
It is the signaling standard that maintains connection and statues between the DCE and DTE

47. How do you apply the ACL to an interface
0
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.
MD5 and you have to enable it if you want to use it.
Make sure you are in interface mode - then use this command ip access-group 1 out/in

48. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
224.0.0.10
A permit statement
View
Port based

49. What are two OSPF authentication methods?
Private: link local
Plaintext and MD5
No
Multicast

50. What is the Wildcard mask
RIPv2 & EIGRP
Designated Router (DR) and a Back-up designated Router (BDR)
The inverse of a subnet mask.
Between areas?