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. In Link state terminology - What is a link?

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2. OSPF routes packets within a single?
MD5 and you have to enable it if you want to use it.
The inverse of a subnet mask.
Autonomous System
A link is an interface on a router


3. How do you configure OSPF
Rouer OSPF 100 - then network xx.xx.xx.xx. area 0
To select the best path to the destination
Anycast
Unicast - Multicast - Anycast


4. What is a VLAN
224.0.0.10
0
MAC based
A group of end stations with a common set of requirements - independent of their physical location


5. Who designed OSPF?
IETF
Unicast - Multicast - Anycast
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
IP


6. What address is FE80:/10
1
Propagation of partial updates that are sent only to those routers that the changes affect.
224.0.0.5
Private: link local


7. What does the DR do?
Loopback
Inter-VLAN routing
Updates all DROTHER Routers when a change occurs
Convergence


8. Spanning-Tree coast of 4
Disable auto summarization
1Gb/s
1.) Enter the Routing Manually 2.) Use Dymamic Routing
110


9. What is the multicast address for EIGRP?
It is the signaling standard that maintains connection and statues between the DCE and DTE
Packet Header
Individual or group IP's
224.0.0.10


10. Classful Protocols summarize
120
15.....16 hops and the interface is down
Packets are processed before they are routed to an outbound interface.
Automatically


11. What do area's do?
Susceptible to routing loops
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
16
Reduce the link-state database and routing table


12. Normal time for STP convergence
Every 5 seconds
30-50 seconds
120
Every 30 minutes by default


13. VTP Client Mode does what?

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14. In regards to ACL's What are the three protocols?
Each router builds a map of the network and determines the shortest path to every network.
One ACL per protocol - One ACL per direction - Once ACL per interface
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.


15. How often are periodic updates sent out via RIP
Cisco - ANSI - Q.933A
Every 30 Seconds
32768
Routes First/ Tests second


16. VTP Server Mode does what?

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17. What are two OSPF authentication methods?
Layers 1 & 2
Convergence
Plaintext and MD5
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.


18. Why is EIGRP considered a Hybrid routing protocol?
2^n
It combines the advantages of Link-State and Distance vector routing protocols.
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
Routes First/ Tests second


19. Dynamic VLAN is what?
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
To select the best path to the destination
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
MAC based


20. How often are OSPF hello packets sent out?
Only with Cisco IOS software release 12.3 (2) T
Every 10 seconds
To select the best path to the destination
Determines the cost which is the bandwidth


21. What is Frame Relay?
...
By DLCI's
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address


22. When do you use Access-Class
Every 5 seconds
A group of end stations with a common set of requirements - independent of their physical location
Between areas?
For line vty 0 4


23. How are Frame Relay Circuits identified?

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24. What do you need to do if there are discontigous networks with EIGRP?
Classful - No VLSM - Broadcast addressing - No route summarization - or Authentication
A backbone area...Also known as Area 0
Anycast
Disable auto summarization


25. What does partial refer to?
The update only includes info about the route change
Every 30 minutes by default
Link-State
Advertised Distance & Feasible distance


26. How does Link-State work?
Susceptible to routing loops
Each router builds a map of the network and determines the shortest path to every network.
Disable auto summarization
Creates - Modifies - and deletes VLAN's - Sends and forwards advertisements - Synchronizes VLAN configuration


27. How does a Standard ACL work?
Checks the source address and then permits or denies the entire protocol suite
Link-State
MAC based
Reduce the link-state database and routing table


28. VTP Transparent Mode does what?

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29. For an adjacency to occur what do the routers have to agree on?
Only with Cisco IOS software release 12.3 (2) T
The inverse of a subnet mask.
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Distance Vector


30. For a VLAN to span across multiple switches What is required?
A trunk
Area Border Router
IP
The inverse of a subnet mask.


31. What is prefix length?
Aka Subnet mask
By DLCI's
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
224.0.0.10


32. How often does a router send link-state advertisements?
IP
Every 30 minutes by default
Different Autonomous Systems
If int status is UP/UP..Check to make sure OSPF is enabled on the interface


33. Exterior Gateway Protocols are designed for use between
Connects the different areas
A combination of Link-state and distance vector
Different Autonomous Systems
Convergence


34. What are subinterfaces?
A single interface may be assigned multiple IPv6 addresses - and every IPv6 interface contains at least one loopback address.
One ACL per protocol - One ACL per direction - Once ACL per interface
Multiple virtual interfaces that are associated with one physical interface
Updates all DROTHER Routers when a change occurs


35. What is ::1
MD5 and you have to enable it if you want to use it.
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.
Every 30 minutes by default
Loopback


36. How does inbound ACL work?
Test Firsts/ Routes Second
Every 30 Seconds
1Gb/s
Only topology within their respective area.


37. With OSPF - each router builds its SPF tree using the same link-state information - but each will have a separate ________ of the topology
Is the time in seconds that a router waits to hear from a neighbor before declaring the router out of service.
1
If int status is UP/UP..Check to make sure OSPF is enabled on the interface
View


38. With ACL's where does the router extract information
Packet Header
Area-ID - hello/dead intervals - authentication - and stub area flag and same IP subnet.
Dijkstra's Algorithm
TRUE


39. Break down the word Link-State

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40. Routing protocol is what?
A protocol on how to communicate with other routers
Match on all routers or it will not work
Six equal cost paths
30-50 seconds


41. What are the major components of OSPF troubleshooting?
OSPF Neighbor adjacencies - OSPF routing table - and OSPF authentication
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
1


42. What type of algorithm does EIGRP use?
Select the routing protocol - then specify the network.
Port based
4
Advance Distance Vector


43. Admin distance of EIGRP?
90
Reduce the link-state database and routing table
RIPv2 & EIGRP
Not scalable - hard to maintain as the network grows


44. What does DLCI stand for?
Place the extended ACL's as close to the source as possible and the standard ACL's as close to the destination as possible.
Telnet connectivity - authentication and extended ACLs
Six equal cost paths
Data Link Connection Identifier


45. An autonomous system could also be referred to as what?
Because a loopback interface is always active and cannot be in a down state like a real interface can.
Domain
IETF
Port based


46. The advantages of VLSM
RIPv2 & EIGRP
The Root bridge is the bridge with the lowest bridge ID
90
Maximizing address efficiency - organization - summarization


47. How is an EUI-64 format interface ID created from a 48-Bit MAC address
Cisco - ANSI - Q.933A
By insereting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
Loopback
Anycast


48. By default - EIGRP will perform automatic summarization on classful boundaries. True or False
Make sure you are in interface mode - then use this command ip access-group 1 out/in
TRUE
Is a classless link-state protocol - creates a neighbor relationship by exchanging hello packets - propagates LSA's rather than routing table updates.
Creates - Modifies - and deletes local VLAN's only - Forwards advertisements - Does not synchronize VLAN configs


49. What is the Wildcard mask
IP
Layers 1 & 2
Determines the cost which is the bandwidth
The inverse of a subnet mask.


50. Purpose of a Routing Protocol?
Multiple virtual interfaces that are associated with one physical interface
Discovery of Remote Networks - Maintaining Up to date information - Choosing the best path available
It is a means for statistically multiplexing many logical data conversations also known as virtual circuits on a single physical transmission link.
Associating the network address with a local DLCI.