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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. Why is this done?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
120
To reduce OSPF traffic
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.

2. Every ACL will need what?
A permit statement
The Root bridge is the bridge with the lowest bridge ID
No
Anycast

3. The AS number must what?
The Diffusing Update Algorithm (DUAL)
All backup routes for destinations.
Match on all routers or it will not work
2^n-2

4. What are subinterfaces?
Multiple virtual interfaces that are associated with one physical interface
Designated Router (DR) and a Back-up designated Router (BDR)
100Mb/s
Packets are processed before they are routed to an outbound interface.

5. A router running EIGRP will store what?
All backup routes for destinations.
16
10Mb/s
Every 5 seconds

6. Describe an Outbound ACL
100Mb/s
Aka Subnet mask
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Telnet connectivity - authentication and extended ACLs

7. Why is EIGRP considered a Hybrid routing protocol?
To reduce OSPF traffic
Multicast
It combines the advantages of Link-State and Distance vector routing protocols.
A backbone area...Also known as Area 0

8. What is one to nearest
4
Carry's traffic for multiple VLANS
4
Anycast

9. Admin distance of RIPv2
120
...
A link is an interface on a router
16

10. How is the root bridge determined?
224.0.0.5
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Reduce the link-state database and routing table
The Root bridge is the bridge with the lowest bridge ID

11. What is a VLAN
Forces protocols to behave as if they were classless
224.0.0.10
A group of end stations with a common set of requirements - independent of their physical location
224.0.0.5

12. What is the default Bridge priority?
Multicast
32768
To reduce OSPF traffic
It is the signaling standard that maintains connection and statues between the DCE and DTE

13. What does the DR do?
Multiple virtual interfaces that are associated with one physical interface
Updates all DROTHER Routers when a change occurs
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Test Firsts/ Routes Second

14. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
RIPv2 & EIGRP
The lower MAC address
Forces protocols to behave as if they were classless
Only topology within their respective area.

15. Problem with static routes
Not scalable - hard to maintain as the network grows
Designated Router (DR) and a Back-up designated Router (BDR)
2^n-2
Routes First/ Tests second

16. What is ::
Designated Router (DR) and a Back-up designated Router (BDR)
Unspecified
2^n
Area Border Router

17. What do area's do?
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Reduce the link-state database and routing table
Data Link Connection Identifier
Scalable and fast convergence

18. What is the maximum number of paths EIGRP can have for the same destination in it's routing table?
Cisco - ANSI - Q.933A
16
Layers 1 & 2
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL

19. How often are BPDU's sent?
Ever 2 seconds
It is the signaling standard that maintains connection and statues between the DCE and DTE
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.

20. How does inbound ACL work?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Connects the different areas
2^n-2
Test Firsts/ Routes Second

21. How does a Standard ACL work?
Checks the source address and then permits or denies the entire protocol suite
Susceptible to routing loops
Classless - VLSM capable - Subnet mask sent in routing update - Multicast addressing - Supports route summarization - and authentication
Port based

22. How often does EIGRP send hellow packets?
Every 10 seconds
RIPv2 and EIGRP
30-50 seconds
Every 5 seconds

23. What is the multicast address for EIGRP?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
4 times the hello interval
A link is an interface on a router
224.0.0.10

24. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
TRUE
The update only includes info about the route change
Loopback
A permit statement

25. What is an ABR
One ACL per protocol - One ACL per direction - Once ACL per interface
The inverse of a subnet mask.
Area Border Router
IETF

26. What is the purpose of LMI
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
It is the signaling standard that maintains connection and statues between the DCE and DTE
90
0

27. What are non designated routers called?
20 seconds: 10 missed BPDU's
Disable auto summarization
DROTHER
A backbone area...Also known as Area 0

28. What is needed to pass traffic from one VLAN to another?
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.
To reduce OSPF traffic
Advance Distance Vector
A layer 3 switch or router

29. VTP Server Mode does what?

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30. VTP Transparent Mode does what?

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31. Exterior Gateway Protocols are designed for use between
No
Susceptible to routing loops
Different Autonomous Systems
Port based

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

33. When do you use Access-Class
Every 10 seconds
For line vty 0 4
All backup routes for destinations.
Forces protocols to behave as if they were classless

34. How do you configure OSPF
Between areas?
4
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
Every 30 minutes by default

35. In Link state terminology - What is a link?
Aka Subnet mask
A link is an interface on a router
4 times the hello interval
Associating the network address with a local DLCI.

36. Max_age time for BPDU's

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37. How does the SPF determine the shortest path?
Distance Vector
0
Determines the cost which is the bandwidth
Domain

38. An autonomous system could also be referred to as what?
Domain
20 seconds: 10 missed BPDU's
90
IETF

39. Classful Protocols summarize
10Mb/s
1.) Enter the Routing Manually 2.) Use Dymamic Routing
Only topology within their respective area.
Automatically

40. Example of a Routing Protocol?
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
EIGRP - OSPF - RIP
Determines the cost which is the bandwidth
Not scalable - hard to maintain as the network grows

41. What type of authentication does EIGRP use?
Every 30 Seconds
The update only includes info about the route change
MD5 and you have to enable it if you want to use it.
A link is an interface on a router

42. How do you apply the ACL to an interface
By DLCI's
Distance Vector
MAC based
Make sure you are in interface mode - then use this command ip access-group 1 out/in

43. What is the Wildcard mask
The inverse of a subnet mask.
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Private: link local
A combination of Link-state and distance vector

44. Spanning-Tree cost of 100
10Mb/s
Six equal cost paths
It is the signaling standard that maintains connection and statues between the DCE and DTE
224.0.0.5

45. Dynamic ACL's are dependent on what?
Anycast
Every 30 Seconds
Telnet connectivity - authentication and extended ACLs
100Mb/s

46. Spanning-Tree cost of 19
100Mb/s
Loopback
No
The update only includes info about the route change

47. With OSPF - what must be defined?
A group of end stations with a common set of requirements - independent of their physical location
Unspecified
It is never useful to send information about a route back in the direction from which the original info came.
A backbone area...Also known as Area 0

48. How many hops are allowed with RIP?
To reduce OSPF traffic
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
15.....16 hops and the interface is down

49. An OSPF neighbor relationship can also be called what?
A link is an interface on a router
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Adjacency
A permit statement

50. By default OSPF uses what type of authentication?
A group of end stations with a common set of requirements - independent of their physical location
Null
All backup routes for destinations.
100Mb/s