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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. Subnetting: What is a 255.255.252.0 in prefix notation
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
Transport
/22
Network

2. What is the layer 2 PDU called?
Pins 1+2 swap places with pins 3+6
Every 64 ip's
Frames
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.

3. What is Layer 7 in the OSI Model?
Every 64 ip's
110
Application
Query and other router responds with a REPLY packet.

4. Subnetting: How many hosts per network if the subnet mask is 255.255.255.240
Session
14 per network
Switch forwards the frame as soon as it can
2 - each port is it's own collision domain

5. Subnetting: where do the networks break with a /28

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6. Subnetting: where do the networks break with a /30

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7. Rip: Command to prevent rip updates on an interface
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
Router(config)# router rip - Router(config-router)# passive-interface fa0/0
Switch forwards frame after receiving the 1st 64bytes to insure no errors.
Every 16 ip's

8. What are the commands to setup SSH?
1 - everything hooked to the hub is in the same collision domain
Router(config)#hostname R1 - R1(config)#line VTY 0 4 - R1(config-line)#login local - R1(config-line)#transport input telnet ssh - R1(config-line)#exit - R1(config)#username {user} password {pass} - R1(config)#ip domain-name {domainname} - R1(config)#
110
F an update has not been received to refresh an existing route after 180 seconds (the default) - the route is marked as invalid by setting the metric to 16. The route is retained in the routing table until the flush timer expires.

9. What is Layer 6 in the OSI Model?
Router(config)#ip route {exit-interface}
Presentation
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change

10. RIP: What is the default Administrative Distance?
62 per network
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change
DCE
120

11. Rip: What does v2 have that v1 does not?
62 per network
Session
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization
Show ip eigrp topology

12. Subnetting: What is a 255.255.255.240 in prefix notation
/28
Frames
It adds the cost of each jump - R1 to R2 over a t1 is a cost of 64 - R2 to computer is a cost of 1. Total cost of route is 65
Network

13. How many Collision domains are there on a with 1 hub and 2 computers?
Network
1 - everything hooked to the hub is in the same collision domain
It adds the cost of each jump - R1 to R2 over a t1 is a cost of 64 - R2 to computer is a cost of 1. Total cost of route is 65
Switch forwards frame after receiving the 1st 64bytes to insure no errors.

14. Rip and EIGRP use what to keep other routers aware of their status?
Physical
Periodic Updates of their routing table
Every 32 ip's
Every 8 ip's

15. OSPF: What is the default administrative distance?
110
It adds the cost of each jump - R1 to R2 over a t1 is a cost of 64 - R2 to computer is a cost of 1. Total cost of route is 65
Shortest path first - (SPF)
1. Router receives update from neighbor indicating a route down - Router makes route as down and starts holddown timer - If router gets an update indicating route is back holddown is removed - If an update is received indicating route is down again i

16. OSPF: What is the process used by OSPF to build a routing table (step by step)
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
Transport
Shortest path first - (SPF)
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1

17. EIGRP: What is the range of Autonomous System numbers?
1-65535
Packets
255.255.255.128
Router(config)#ip route {network address} {subnet-mask}

18. Name the OSI Layers
Frames
Switch forwards the frame as soon as it can
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
Shortest path first - (SPF)

19. OSPF: How does OSPF calulate the cost of each route - to figure out which way to go?
Session
Packets
Periodic Updates of their routing table
It adds the cost of each jump - R1 to R2 over a t1 is a cost of 64 - R2 to computer is a cost of 1. Total cost of route is 65

20. OSPF: What Algorithm is used?
IEEE 802.3u
Shortest path first - (SPF)
F an update has not been received to refresh an existing route after 180 seconds (the default) - the route is marked as invalid by setting the metric to 16. The route is retained in the routing table until the flush timer expires.
Physical

21. Switching Methods: What is Store and Forward?
Switch forwards frame once it completely receives it
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
Frames
Every 8 ip's

22. CABLES: What is the T568B Pinout Standard?
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
Every 4 ip's
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown
110

23. OSPF: Commands to enable OSPF area 0 and advertise network 10.1.1.1 /28
255.255.192.0
1 - everything hooked to the hub is in the same collision domain
1. NVRAM - 2. Flash (sequential) - 3. TFTP server (network boot) - 4. ROM (partial IOS)
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0

24. Using the magic number how to you figure the network?
255.255.0.0
Show ip eigrp topology
Closest multiple of the magic number that is not over the interesting octets number.
Session

25. How many Collision domains are there on a with 1 switch 2 computers?

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26. EIGRP: What is the default administrative distance?
1-65535
Closest multiple of the magic number that is not over the interesting octets number.
120
100

27. What are the comands to set the clock rate in a serial connection?
Packets
R1(config)#router rip - R1(config-router)#version 2
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE
IEEE 802.3

28. Rip: how do hold down timers work?
/22
1. Router receives update from neighbor indicating a route down - Router makes route as down and starts holddown timer - If router gets an update indicating route is back holddown is removed - If an update is received indicating route is down again i
Switch forwards the frame as soon as it can
255.255.255.252

29. Switching Methods: What is Cut-through?
2 hosts
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
Switch forwards the frame as soon as it can
126 per network

30. IEEE Standards: Ethernet
Physical
120
IEEE 802.3
IEEE 802.3ab

31. Rip Timers: How long is the default for Holddown timer.
Closest multiple of the magic number that is not over the interesting octets number.
180
Shortest path first - (SPF)
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization

32. Subnetting: What is a /18 in Decimal
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
255.255.192.0
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown
F an update has not been received to refresh an existing route after 180 seconds (the default) - the route is marked as invalid by setting the metric to 16. The route is retained in the routing table until the flush timer expires.

33. RIP Timers: What is an Flush Timer?
Every 8 ip's
Every 64 ip's
/9
By default - the flush timer is set for 240 seconds - which is 60 seconds longer than the invalid timer. When the flush timer expires - the route is removed from the routing table.

34. Using the magic number how to you figure the broadcast?
Network
/9
Add the magic number to the network minus 1
Frames

35. Subnetting: What is a /25 in Decimal
2 - the bridge separates the collision domain
Every 16 ip's
IEEE 802.3u
255.255.255.128

36. EIGRP: What packet is used to propagate routing information?
1 - everything hooked to the hub is in the same collision domain
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet
110
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical

37. Subnetting: How many hosts per network if the subnet mask is 255.255.255.224
Show ip eigrp topology
Segments
Bellman-Ford
30 per network

38. EIGRP: What is the name of the algorithm used for EIGRP?
Frames
Every 32 ip's
DUAL: Difusing Update Algorithm
Hop Count

39. What is the metric for EIGRP
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
Bandwidth - Delay - reliability and Load
Segments
Switch forwards frame once it completely receives it

40. Command for a static route with 'Next Hop' Address
1 - everything hooked to the hub is in the same collision domain
Router(config)#ip route {network address} {subnet-mask}
F an update has not been received to refresh an existing route after 180 seconds (the default) - the route is marked as invalid by setting the metric to 16. The route is retained in the routing table until the flush timer expires.
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown

41. What is the Data-Link PDU called?
Frames
255.255.255.224
62 per network
Every 128 ip's

42. What is Layer 2 in the OSI Model?
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown
Hop Count
Every 64 ip's
Data-Link

43. What is Layer 5 in the OSI Model?
Session
Frames
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization
IEEE 802.3

44. What gets the clock rate - DCE or DTE?
Application
Every 32 ip's
Router(config)#ip route {exit-interface}
DCE

45. RIP: Commands to enable ripv1 on a router and add a route to 192.168.1.2
Bellman-Ford
2 - the bridge separates the collision domain
R3(config)#router rip - R3(config-router)#network 192.168.1.2
Transport

46. Rip: What causes a triggered update?
/22
2 hosts
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.
110

47. IEEE Standards: Gibabit Ethernet (Copper)
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
IEEE 802.3ab
Every 64 ip's
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database

48. CABLES: What is the T568A Pinout Standard?
Router(config)# router rip - Router(config-router)# passive-interface fa0/0
Network
Switch forwards frame after receiving the 1st 64bytes to insure no errors.
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown

49. OSPF: how do you change the cost of an interface for OSPF?
Switch forwards frame after receiving the 1st 64bytes to insure no errors.
/28
R
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change

50. Symbol for Rip on a Show ip route
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
Network
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
R

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