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. For a VLAN to span across multiple switches What is required?
Anycast
All backup routes for destinations.
A trunk
The Root bridge is the bridge with the lowest bridge ID


2. What two things need to be done to enable dynamic routing?
Every 30 Seconds
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Ever 2 seconds
Select the routing protocol - then specify the network.


3. How often are OSPF hello packets sent out?
Only topology within their respective area.
Associating the network address with a local DLCI.
Every 10 seconds
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.


4. Purpose of a Routing Protocol?
Dijkstra's Algorithm
Aka Subnet mask
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
RIPv2 and EIGRP


5. Dynamic VLAN is what?
Distance Vector
Reduce the link-state database and routing table
MAC based
EIGRP - OSPF - RIP


6. When placing ACL's in the Network...Do what?

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7. Admin distance of EIGRP?
Susceptible to routing loops
A link is an interface on a router
90
It is never useful to send information about a route back in the direction from which the original info came.


8. An autonomous system could also be referred to as what?
...
Domain
Dijkstra's Algorithm
DROTHER


9. Spanning-Tree coast of 4
Different Autonomous Systems
Dijkstra's Algorithm
1Gb/s
A permit statement


10. VTP Transparent Mode does what?

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11. How do you configure a sub interface?
The inverse of a subnet mask.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
2^n-2
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


12. How many hops are allowed with RIP?
16
15.....16 hops and the interface is down
4
Individual or group IP's


13. What are two OSPF authentication methods?
For line vty 0 4
Susceptible to routing loops
Each router builds a map of the network and determines the shortest path to every network.
Plaintext and MD5


14. A router running EIGRP will store what?
Test Firsts/ Routes Second
All backup routes for destinations.
The update only includes info about the route change
If int status is UP/UP..Check to make sure OSPF is enabled on the interface


15. Why is EIGRP considered a Hybrid routing protocol?
A trunk
The update only includes info about the route change
Only topology within their respective area.
It combines the advantages of Link-State and Distance vector routing protocols.


16. In frame relay What is Inverse Arp
Associating the network address with a local DLCI.
Each router builds a map of the network and determines the shortest path to every network.
100Mb/s
Scalable and fast convergence


17. How are Frame Relay Circuits identified?

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18. In Link state terminology - What is a link?
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Because a loopback interface is always active and cannot be in a down state like a real interface can.
4 times the hello interval
A link is an interface on a router


19. Routing protocol is what?
Autonomous System
A protocol on how to communicate with other routers
Reduce the link-state database and routing table
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


20. Routers are used for what?
To select the best path to the destination
90
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.


21. What is prefix length?
Aka Subnet mask
IETF
Packets are processed before they are routed to an outbound interface.
Reduce the link-state database and routing table


22. How often are LMI's sent out?
Unspecified
Every 10 Seconds
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Supports both unequal metric load balancing and equal metric balancing.


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

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24. Why is this done?
It combines the advantages of Link-State and Distance vector routing protocols.
Forces protocols to behave as if they were classless
To reduce OSPF traffic
View


25. What does EIGRP use to calculate it's metric?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
Bandwidth & Delay
IP
To select the best path to the destination


26. Spanning-Tree cost of 100
1Gb/s
10Mb/s
Make sure you are in interface mode - then use this command ip access-group 1 out/in
RIPv2 and EIGRP


27. By default OSPF uses what type of authentication?
Null
Adjacency
MD5 and you have to enable it if you want to use it.
2^n


28. Explain how routing loops occur with RIP?
...
Port based
Bandwidth & Delay
Propagation of partial updates that are sent only to those routers that the changes affect.


29. What are the two ways routers can learn about the destination information?
1.) Enter the Routing Manually 2.) Use Dymamic Routing
20 seconds: 10 missed BPDU's
1
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0


30. VTP Client Mode does what?

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31. What is a VLAN
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
A group of end stations with a common set of requirements - independent of their physical location
TRUE


32. In regards to ACL's What are the three protocols?
Every 10 Seconds
Different Autonomous Systems
One ACL per protocol - One ACL per direction - Once ACL per interface
30-50 seconds


33. What type of algorithm does OSPF & IS-IS use?
Link-State
32768
Anycast
A layer 3 switch or router


34. What does the back bone router do?
Different Autonomous Systems
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
1Gb/s
Connects the different areas


35. Formula for determining hosts
Every 10 seconds
2^n-2
Automatically
Link is the router interface and State is the description of an interface and it's relationship to neighboring routers


36. Spanning-Tree cost of 19
Cisco - ANSI - Q.933A
4 times the hello interval
100Mb/s
2^n-2


37. What are subinterfaces?
Telnet connectivity - authentication and extended ACLs
...
Multiple virtual interfaces that are associated with one physical interface
No


38. How does a Standard ACL work?
Adjacency
Domain
Every 10 Seconds
Checks the source address and then permits or denies the entire protocol suite


39. What does this mean? R 192.168.1.0/24 [120/2] via 10.1.1.2
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
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.
A backbone area...Also known as Area 0
Bandwidth & Delay


40. Normal time for STP convergence
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
30-50 seconds


41. Admin distance of a connected Network?
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs
90
Unicast - Multicast - Anycast
0


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

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43. What does partial refer to?
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Only with Cisco IOS software release 12.3 (2) T
The update only includes info about the route change
Forces protocols to behave as if they were classless


44. An OSPF neighbor relationship can also be called what?
10Mb/s
Data Link Connection Identifier
Multicast
Adjacency


45. The no auto-summary command does what?
0
It is the signaling standard that maintains connection and statues between the DCE and DTE
Forces protocols to behave as if they were classless
Every 5 seconds


46. Dynamic ACL's are dependent on what?
Bandwidth & Delay
TRUE
Telnet connectivity - authentication and extended ACLs
By DLCI's


47. Problem with static routes
Susceptible to routing loops
32768
Updates all DROTHER Routers when a change occurs
Not scalable - hard to maintain as the network grows


48. What does a trunk do?

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49. Can a Router exchange routing information if they are using different Routing Protocols?
Between areas?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
Cannot create - modify or delete VLAN's - sends and forwards advertisements - synchronizes VLAn configurations.
No


50. Who designed OSPF?
Inter-VLAN routing
4
IETF
MD5 and you have to enable it if you want to use it.