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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. What are the major components of OSPF troubleshooting?
It is the signaling standard that maintains connection and statues between the DCE and DTE
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Unicast - Multicast - Anycast
DROTHER

2. What is the default for equal cost paths for load balancing with OSPF?
Telnet connectivity - authentication and extended ACLs
Advertised Distance & Feasible distance
4
1

3. Describe features of RIPv1
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.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
Supports both unequal metric load balancing and equal metric balancing.
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication

4. What does the back bone router do?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
10Mb/s
Connects the different areas
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.

5. How long is the dead interval
4 times the hello interval
4
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
By DLCI's

6. Classful Protocols summarize
Automatically
Different Autonomous Systems
No
Advertised Distance & Feasible distance

7. Nonbackbone - internal routers are aware of what topology
For line vty 0 4
Convergence
4
Only topology within their respective area.

8. For an adjacency to occur what do the routers have to agree on?
Null
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
1Gb/s
Individual or group IP's

9. How do you apply the ACL to an interface
To reduce OSPF traffic
Match on all routers or it will not work
Make sure you are in interface mode - then use this command ip access-group 1 out/in
To select the best path to the destination

10. What distant vector protocols exhibit classless behavior?
RIPv2 and EIGRP
Every 30 minutes by default
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.

11. What are the two ways routers can learn about the destination information?
Multicast
1.) Enter the Routing Manually 2.) Use Dymamic Routing
The update only includes info about the route change
Area Border Router

12. What is an ABR
Area Border Router
DROTHER
A layer 3 switch or router
Data Link Connection Identifier

13. How do you configure OSPF
A permit statement
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0

14. Describe an Outbound ACL
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Layers 1 & 2
The Root bridge is the bridge with the lowest bridge ID
No

15. What is the default load balancing for RIP
Link-State
Every 10 seconds
4
Different Autonomous Systems

16. What two things need to be done to enable dynamic routing?
224.0.0.5
To select the best path to the destination
Select the routing protocol - then specify the network.
Individual or group IP's

17. In bridge root selection - if the bridge prioritys are the same - what determines root selection?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
The lower MAC address
Individual or group IP's
The Root bridge is the bridge with the lowest bridge ID

18. What is the Wildcard mask
Cisco - ANSI - Q.933A
The inverse of a subnet mask.
The lower MAC address
A backbone area...Also known as Area 0

19. What two classless protocols act classful by default?
120
RIPv2 & EIGRP
For line vty 0 4
Cisco - ANSI - Q.933A

20. What are two statements that are true of IPv6 address representation?
224.0.0.5
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Between areas?
Domain

21. Routers running distances vector routing protocol send periodic updates even if there are no changes in the network. True or False?
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
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.
Determines the cost which is the bandwidth
TRUE

22. What Layer does Frame Relay operate at?
Make sure you are in interface mode - then use this command ip access-group 1 out/in
120
Layers 1 & 2
Private: link local

23. What does partial refer to?
Different Autonomous Systems
Between areas?
Six equal cost paths
The update only includes info about the route change

24. How do you configure a sub interface?
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
110
DROTHER
Susceptible to routing loops

25. Dynamic VLAN is what?
Advance Distance Vector
MAC based
Individual or group IP's
Every 10 Seconds

26. How is the root bridge determined?
Connects the different areas
Reduce the link-state database and routing table
The Root bridge is the bridge with the lowest bridge ID
Every 30 Seconds

27. By default OSPF uses what type of authentication?
4
110
Null
One ACL per protocol - One ACL per direction - Once ACL per interface

28. Spanning-Tree cost of 100
Every 5 seconds
1Gb/s
10Mb/s
Only topology within their respective area.

29. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
View
Adjacency
20 seconds: 10 missed BPDU's
MAC based

30. Normal time for STP convergence
30-50 seconds
Test Firsts/ Routes Second
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Telnet connectivity - authentication and extended ACLs

31. With OSPF - there must always be a area......
IP
Anycast
0
A link is an interface on a router

32. How often are LMI's sent out?
Routes First/ Tests second
Every 10 Seconds
120
Susceptible to routing loops

33. What do you need to do if there are discontigous networks with EIGRP?
224.0.0.5
Disable auto summarization
0
Telnet connectivity - authentication and extended ACLs

34. What algorithm does EIGRP use?
Distance Vector
2^n-2
The Diffusing Update Algorithm (DUAL)
To select the best path to the destination

35. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
TRUE
Domain
Make sure you are in interface mode - then use this command ip access-group 1 out/in
Unicast - Multicast - Anycast

36. Spanning-Tree coast of 4
It combines the advantages of Link-State and Distance vector routing protocols.
Every 30 minutes by default
Layers 1 & 2
1Gb/s

37. What is the spilt horizon rule?
It is never useful to send information about a route back in the direction from which the original info came.
Different Autonomous Systems
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers
Susceptible to routing loops

38. In regards to troubleshooting OSPF what should you check?
TRUE
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
...
Test Firsts/ Routes Second

39. When do you use Access-Class
A trunk
The inverse of a subnet mask.
A layer 3 switch or router
For line vty 0 4

40. How are Frame Relay Circuits identified?

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41. What is the multicast address for EIGRP?
16
Test Firsts/ Routes Second
224.0.0.10
A trunk

42. How does EIGRP work with regards to Load Balancing
Individual or group IP's
MD5 and you have to enable it if you want to use it.
Supports both unequal metric load balancing and equal metric balancing.
Different Autonomous Systems

43. What type of algorithm does RIP use?
One ACL per protocol - One ACL per direction - Once ACL per interface
0
Distance Vector
Null

44. What is Frame Relay?
Port based
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Checks the source address and then permits or denies the entire protocol suite
By DLCI's

45. How does a Standard ACL work?
Layers 1 & 2
Checks the source address and then permits or denies the entire protocol suite
Checks the source and destination address then permits or denies specific protocols
4

46. Can a Router exchange routing information if they are using different Routing Protocols?
Inter-VLAN routing
Individual or group IP's
No
Disable auto summarization

47. What is prefix length?
Area Border Router
Aka Subnet mask
Six equal cost paths
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

48. An autonomous system could also be referred to as what?
Domain
30-50 seconds
Incoming packets are routed to the outbound interface - and then they are processed through the outbound ACL
Advertised Distance & Feasible distance

49. What type of algorithm does EIGRP use?
Autonomous System
It combines the advantages of Link-State and Distance vector routing protocols.
10Mb/s
Advance Distance Vector

50. Admin distance of a connected Network?
1
It combines the advantages of Link-State and Distance vector routing protocols.
No
0