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Instructions:

Answer 50 questions in 15 minutes.
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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 is Layer 4 in the OSI Model?
Transport
Session
2 - the bridge separates the collision domain
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown

2. EIGRP: What is the default administrative distance?
R
100
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change
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)#

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

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4. OSPF: What is the process used by OSPF to build a routing table (step by step)
14 per network
Periodic Updates of their routing table
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
D

5. Rip and EIGRP use what to keep other routers aware of their status?
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
62 per network
Router(config)# router rip - Router(config-router)# passive-interface fa0/0
Periodic Updates of their routing table

6. Subnetting: What is a 255.128.0.0 in prefix notation
/9
Switch forwards the frame as soon as it can
2 - each port is it's own collision domain
Packets

7. Switching Methods: What is Fragment-free?
Switch forwards frame after receiving the 1st 64bytes to insure no errors.
2 - the bridge separates the collision domain
/28
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.

8. RIP Timers: What is an Flush Timer?
Frames
255.255.255.128
180 seconds
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.

9. IEEE Standards: Fast Ethernet
Switch forwards the frame as soon as it can
Hop Count
Every 8 ip's
IEEE 802.3u

10. EIGRP: What is the range of Autonomous System numbers?
DCE
1-65535
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
255.255.0.0

11. Subnetting: where do the networks break with a /26

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12. What is the Network PDU called?
1-65535
Switch forwards frame once it completely receives it
110
Packets

13. What Layer does CDP operate at?
Layer 2
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
Every 8 ip's
Packets

14. OSPF: What Algorithm is used?
Bellman-Ford
Shortest path first - (SPF)
IEEE 802.3u
2 - the bridge separates the collision domain

15. RIP: What is the default Administrative Distance?
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
60
120

16. Switching Methods: What is Store and Forward?
R1(config)#router rip - R1(config-router)#version 2
Pins 1+2 swap places with pins 3+6
30 per network
Switch forwards frame once it completely receives it

17. How do you find the magic number for subnetting?
256 - the interesting (non-255/0) number. IE: 255.240.0.0 the interesting number is 240
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE
2 - each port is it's own collision domain
R3(config)#router rip - R3(config-router)#network 192.168.1.2

18. Rip Timers: How long is the default for Flush timer.
60
DUAL: Difusing Update Algorithm
IEEE 802.3ab
120

19. Command for a static route with exit interface
256 - the interesting (non-255/0) number. IE: 255.240.0.0 the interesting number is 240
Router(config)#ip route {exit-interface}
Packets
180

20. IEEE Standards: Gibabit Ethernet (Copper)
Pins 1+2 swap places with pins 3+6
IEEE 802.3ab
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)#
255.255.192.0

21. IEEE Standards: Gibabit Ethernet (Fibre)
Bandwidth - Delay - reliability and Load
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE
Session
IEEE 802.3z

22. EIGRP: How do you view if there are any successor routes?
126 per network
Switch forwards frame once it completely receives it
2 hosts
Show ip eigrp topology

23. What is Layer 7 in the OSI Model?
Segments
Shortest path first - (SPF)
Application
Data-Link

24. What is the layer 3 PDU called?
Packets
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
Query and other router responds with a REPLY packet.
255.255.192.0

25. Subnetting: How many hosts per network if the subnet mask is 255.255.255.192
Bellman-Ford
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown
62 per network
Switch forwards frame once it completely receives it

26. What is the metric for EIGRP
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown
Bandwidth - Delay - reliability and Load
1-65535
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.

27. Symbol for EIGRP on a Show ip route
D
Frames
Session
1. NVRAM - 2. Flash (sequential) - 3. TFTP server (network boot) - 4. ROM (partial IOS)

28. How many Collision domains are there on a with 1 hub and 2 computers?
IEEE 802.3ab
1 - everything hooked to the hub is in the same collision domain
30 per network
100

29. Subnetting: What is a /27 in Decimal
Layer 2
D
255.255.255.224
100

30. Subnetting: How many hosts per network if the subnet mask is 255.255.255.240
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change
14 per network
126 per network
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.

31. OSPF: What does OSPF use for its metric?
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
Layer 2
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
Add the magic number to the network minus 1

32. What is Layer 3 in the OSI Model?
Network
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet
Every 128 ip's
/28

33. Subnetting: How many hosts per network if the subnet mask is 255.255.255.252
Pins 1+2 swap places with pins 3+6
2 hosts
/24
Packets

34. Name the TCP/IP Layers
Add the magic number to the network minus 1
Switch forwards the frame as soon as it can
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
255.255.255.252

35. What is Layer 1 in the OSI Model?
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
Pins 1+2 swap places with pins 3+6
Physical
30 per network

36. What are the comands to set the clock rate in a serial connection?
60
IEEE 802.3z
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE
Application

37. What is the metric for RIP
Every 64 ip's
Transport
Closest multiple of the magic number that is not over the interesting octets number.
Hop Count

38. OSPF: how do you change the cost of an interface for OSPF?
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
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change
Bandwidth - Delay - reliability and Load

39. OSPF: What is the default administrative distance?
Frames
110
Closest multiple of the magic number that is not over the interesting octets number.
255.255.255.224

40. What is Layer 6 in the OSI Model?
Presentation
IEEE 802.3ab
Add the magic number to the network minus 1
Packets

41. Subnetting: How many hosts per network if the subnet mask is 255.255.255.224
Packets
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
30 per network
126 per network

42. RIP Timers: What is an Holddown Timer?
Segments
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
This timer stabilizes routing information and helps prevent routing loops during periods when the topology is converging on new information. Once a route is marked as unreachable - it must stay in holddown long enough for all routers in the topology
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization

43. OSPF: Commands to enable OSPF area 0 and advertise network 10.1.1.1 /28
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
180 seconds
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet
Show ip eigrp topology

44. Rip: how do hold down timers work?
/9
Every 64 ip's
Add the magic number to the network minus 1
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

45. RIP: What Algorithm is used in RIP>
255.255.255.252
Bellman-Ford
R1(config)#router rip - R1(config-router)#version 2
Router(config)#ip route {network address} {subnet-mask}

46. OSPF: How does OSPF calulate the cost of each route - to figure out which way to go?
180
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
Every 16 ip's
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical

47. How many Collision domains are there on a with 1 hub and 1 bridge 2 computers?
120
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
2 - the bridge separates the collision domain
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE

48. Subnetting: How many hosts per network if the subnet mask is 255.255.255.128
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
126 per network
Frames
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.

49. What is the Data-Link PDU called?
Packets
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization
Frames
120

50. CABLES: What is the T568A Pinout Standard?
IEEE 802.3ab
Every 16 ip's
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical