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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. Explain how routing loops occur with RIP?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Advance Distance Vector
...

2. Admin distance of EIGRP?
One ACL per protocol - One ACL per direction - Once ACL per interface
90
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Supports both unequal metric load balancing and equal metric balancing.

3. Static VLAN is what?
Port based
A group of end stations with a common set of requirements - independent of their physical location
Convergence
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.

4. Max_age time for BPDU's

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5. An OSPF neighbor relationship can also be called what?
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
Adjacency
Inter-VLAN routing
Designated Router (DR) and a Back-up designated Router (BDR)

6. Can a Router exchange routing information if they are using different Routing Protocols?
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.
Not scalable - hard to maintain as the network grows
Propagation of partial updates that are sent only to those routers that the changes affect.
No

7. How does inbound ACL work?
Maximizing address efficiency - organization - summarization
Test Firsts/ Routes Second
The inverse of a subnet mask.
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

8. What is the Wildcard mask
All backup routes for destinations.
The lower MAC address
The inverse of a subnet mask.
Each router builds a map of the network and determines the shortest path to every network.

9. OSPF will elect a what?
Designated Router (DR) and a Back-up designated Router (BDR)
10Mb/s
Reduce the link-state database and routing table
EIGRP - OSPF - RIP

10. When do you use Access-Class
View
For line vty 0 4
4
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

11. What is prefix length?
Designated Router (DR) and a Back-up designated Router (BDR)
Aka Subnet mask
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Every 10 Seconds

12. A router running EIGRP will store what?
To reduce OSPF traffic
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
A link is an interface on a router
All backup routes for destinations.

13. What does the back bone router do?
A combination of Link-state and distance vector
4 times the hello interval
Connects the different areas
IETF

14. Problem with RIP
Private: link local
Susceptible to routing loops
4
All backup routes for destinations.

15. Admin distance of a Static Route?
A protocol on how to communicate with other routers
The lower MAC address
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
1

16. How often does a router send link-state advertisements?
Every 30 minutes by default
By DLCI's
It combines the advantages of Link-State and Distance vector routing protocols.
Forces protocols to behave as if they were classless

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

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18. Routers are used for what?
Different Autonomous Systems
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
A permit statement
To select the best path to the destination

19. What does the DR do?
Unicast - Multicast - Anycast
A protocol on how to communicate with other routers
0
Updates all DROTHER Routers when a change occurs

20. What type of authentication does EIGRP use?
Checks the source address and then permits or denies the entire protocol suite
15.....16 hops and the interface is down
MD5 and you have to enable it if you want to use it.
Telnet connectivity - authentication and extended ACLs

21. How often are BPDU's sent?
Supports both unequal metric load balancing and equal metric balancing.
Ever 2 seconds
4 times the hello interval
Multicast

22. How often does EIGRP send hellow packets?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Associating the network address with a local DLCI.
Every 5 seconds

23. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
16
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.
Each router builds a map of the network and determines the shortest path to every network.
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration

24. Example of a Routing Protocol?
EIGRP - OSPF - RIP
TRUE
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Aka Subnet mask

25. Describe an Outbound ACL
1
2^n
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

26. With OSPF - there must always be a area......
Each router builds a map of the network and determines the shortest path to every network.
By DLCI's
0
To reduce OSPF traffic

27. Spanning-Tree cost of 19
100Mb/s
Area Border Router
15.....16 hops and the interface is down
A group of end stations with a common set of requirements - independent of their physical location

28. What distant vector protocols exhibit classless behavior?
...
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
RIPv2 and EIGRP
A protocol on how to communicate with other routers

29. Spanning-Tree coast of 4
Checks the source address and then permits or denies the entire protocol suite
224.0.0.5
1Gb/s
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

30. What two classless protocols act classful by default?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
90
View
RIPv2 & EIGRP

31. Formula for determining Subnets
Checks the source address and then permits or denies the entire protocol suite
Link-State
2^n
Unspecified

32. The advantages of VLSM
Maximizing address efficiency - organization - summarization
Select the routing protocol - then specify the network.
TRUE
If int status is UP/UP..Check to make sure OSPF is enabled on the interface

33. What type of algorithm does EIGRP use?
The Diffusing Update Algorithm (DUAL)
Test Firsts/ Routes Second
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Advance Distance Vector

34. Wildcard masks filter

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35. The no auto-summary command does what?
Automatically
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Only with Cisco IOS software release 12.3 (2) T
Forces protocols to behave as if they were classless

36. What address is FE80:/10
EIGRP - OSPF - RIP
Private: link local
0
Propagation of partial updates that are sent only to those routers that the changes affect.

37. What does DLCI stand for?
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.
Cisco - ANSI - Q.933A
Data Link Connection Identifier
Convergence

38. How does EIGRP work with regards to Load Balancing
Routes First/ Tests second
224.0.0.5
Supports both unequal metric load balancing and equal metric balancing.
Telnet connectivity - authentication and extended ACLs

39. How long is the dead interval
4 times the hello interval
Telnet connectivity - authentication and extended ACLs
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Different Autonomous Systems

40. Describe a Inbound ACL
MAC based
It is never useful to send information about a route back in the direction from which the original info came.
It combines the advantages of Link-State and Distance vector routing protocols.
Packets are processed before they are routed to an outbound interface.

41. How does Link-State work?
Select the routing protocol - then specify the network.
The Diffusing Update Algorithm (DUAL)
Each router builds a map of the network and determines the shortest path to every network.
Associating the network address with a local DLCI.

42. What two parameters does EIGRP use to determine the best route?
Scalable and fast convergence
Advertised Distance & Feasible distance
Inter-VLAN routing
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.

43. For an adjacency to occur what do the routers have to agree on?
MD5 and you have to enable it if you want to use it.
Private: link local
Carry's traffic for multiple VLANS
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.

44. What Layer does Frame Relay operate at?
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Individual or group IP's
Layers 1 & 2
It is never useful to send information about a route back in the direction from which the original info came.

45. Can you delete individual entries in a specific ACL?
Checks the source address and then permits or denies the entire protocol suite
Private: link local
Only with Cisco IOS software release 12.3 (2) T
Supports both unequal metric load balancing and equal metric balancing.

46. By default OSPF uses what type of authentication?
Unicast - Multicast - Anycast
A group of end stations with a common set of requirements - independent of their physical location
Null
Inter-VLAN routing

47. Example of a Routed Protocol?
IP
Anycast
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
2^n

48. Every ACL will need what?
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.
Autonomous System
A permit statement
32768

49. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
EIGRP - OSPF - RIP
The lower MAC address
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
A trunk

50. Explain OSPF

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