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 is the layer 4 PDU called?
DCE
Query and other router responds with a REPLY packet.
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE
Segments


2. EIGRP: How do you view if there are any successor routes?
Closest multiple of the magic number that is not over the interesting octets number.
Add the magic number to the network minus 1
Show ip eigrp topology
62 per network


3. Subnetting: How many hosts per network if the subnet mask is 255.255.255.240
110
Layer 2
Includes sub-net mask in updates making it classless - has authentication - supports variable length subnet mask - uses multicast instead of broadcast - supports manual summarization
14 per network


4. OSPF: What does OSPF use for its metric?
IEEE 802.3
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
Presentation


5. Subnetting: What is a 255.128.0.0 in prefix notation
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.
Router(config)#ip route {exit-interface}
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
/9


6. What is the Data-Link PDU called?
Frames
110
1 - everything hooked to the hub is in the same collision domain
R1(config)#router eigrp 7 - R1(config-router)#network 192.168.1.0 0.0.0.3


7. EIGRP: What is the default administrative distance?
100
/9
IEEE 802.3ab
1 - everything hooked to the hub is in the same collision domain


8. OSPF: What Algorithm is used?
The metric is called cost - and refers to the speed of the port - IE 56kps = 1785 where Fast Ethernet = 1
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.
Shortest path first - (SPF)
Every 32 ip's


9. How do you find the magic number for subnetting?
100
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
IEEE 802.3u


10. RIP: Commands to enable ripv1 on a router and add a route to 192.168.1.2
255.255.192.0
Presentation
Physical
R3(config)#router rip - R3(config-router)#network 192.168.1.2


11. Rip: What causes a triggered update?
Interface changes state (up/down) - A route has entered or exited the unreachable state - a route was installed in the routing table.
(5)Application - (4)Transport - (3)Internet - (2)Data-Link - (1)Physical
Hop Count
IEEE 802.3u


12. What is Layer 5 in the OSI Model?
Session
/22
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.
255.255.255.224


13. Command for a static route with 'Next Hop' Address
R
255.255.192.0
IEEE 802.3
Router(config)#ip route {network address} {subnet-mask}


14. Symbol for Rip on a Show ip route
30 per network
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
R
120


15. RIP Timers: What is an invalid Timer?
Application
Every 64 ip's
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


16. What is Layer 4 in the OSI Model?
Every 4 ip's
110
1-65535
Transport


17. What is Layer 6 in the OSI Model?
Presentation
Every 64 ip's
1-65535
62 per network


18. CABLES: What is the T568B Pinout Standard?
2 - the bridge separates the collision domain
1:O/W - 2:Orange - 3:G/W - 4:Blue - 5:B/W - 6:Green - 7:Brown/W - 8:Brown
255.255.255.252
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


19. What is Layer 3 in the OSI Model?
Router(config)#ip route {exit-interface}
Network
255.255.192.0
2 hosts


20. Subnetting: How many hosts per network if the subnet mask is 255.255.255.128
Data-Link
Show ip eigrp topology
Frames
126 per network


21. RIP Timers: What is an Flush Timer?
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.
Pins 1+2 swap places with pins 3+6
Every 32 ip's
Transport


22. Rip: What is the command to enable Ripv2?
D
R1(config)#router rip - R1(config-router)#version 2
110
Use command bandwidth {bandwidth in KPS} or the command ip ospf cost {amount} both in the interface you want to change


23. What gets the clock rate - DCE or DTE?
180 seconds
Every 64 ip's
DCE
1. NVRAM - 2. Flash (sequential) - 3. TFTP server (network boot) - 4. ROM (partial IOS)


24. What is the layer 3 PDU called?
R1(config)#int s0/0 - R1(config-inf)clock rate 64000 <-- on the DCE
Every 128 ip's
Packets
1-65535


25. What is Layer 1 in the OSI Model?
60
Physical
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical
Bandwidth - Delay - reliability and Load


26. EIGRP: What is the commands to enable EIGRP for autonomous area 7 and to route network 192.168.1.0 /30
Every 128 ip's
Network
R1(config)#router eigrp 7 - R1(config-router)#network 192.168.1.0 0.0.0.3
255.255.255.128


27. EIGRP: What packet is used to search for networks?
Query and other router responds with a REPLY packet.
1. NVRAM - 2. Flash (sequential) - 3. TFTP server (network boot) - 4. ROM (partial IOS)
Show ip eigrp topology
Periodic Updates of their routing table


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

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29. What is the layer 2 PDU called?
255.255.255.128
100
Layer 2
Frames


30. EIGRP: What packet is used to propagate routing information?
Session
Router(config)# router rip - Router(config-router)# passive-interface fa0/0
R1(config)# router OSPF 1 - R1(config-router)#network 10.1.1.0 0.0.0.15 area 0
Can be multicast or unicast depending on number of routers - Update packets. Responds with an ACK packet


31. Subnetting: What is a /16 in Decimal
255.255.0.0
Physical
2 - the bridge separates the collision domain
110


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

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33. Using the magic number how to you figure the broadcast?
Closest multiple of the magic number that is not over the interesting octets number.
1 - everything hooked to the hub is in the same collision domain
Add the magic number to the network minus 1
Every 16 ip's


34. Subnetting: How many hosts per network if the subnet mask is 255.255.255.252
2 hosts
1-65535
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
/9


35. What is the metric for EIGRP
Bandwidth - Delay - reliability and Load
Add the magic number to the network minus 1
256 - the interesting (non-255/0) number. IE: 255.240.0.0 the interesting number is 240
62 per network


36. Subnetting: What is a 255.255.252.0 in prefix notation
Switch forwards frame after receiving the 1st 64bytes to insure no errors.
/22
Application
126 per network


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

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38. What is Layer 2 in the OSI Model?
Data-Link
Physical
/28
2 - each port is it's own collision domain


39. EIGRP: What is the hello packet used for?
126 per network
Layer 2
Segments
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds


40. What is the boot sequence for Cisco Routers?
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)#
Physical
1. NVRAM - 2. Flash (sequential) - 3. TFTP server (network boot) - 4. ROM (partial IOS)


41. What is the metric for RIP
Hop Count
IEEE 802.3ab
Segments
/9


42. What is the Transport PDU called?
DUAL: Difusing Update Algorithm
R
180 seconds
Segments


43. CABLES: What is the T568A Pinout Standard?
1-65535
Bellman-Ford
1:G/W - 2:Green - 3:O/W - 4:Blue - 5:B/W - 6:Orange - 7:Brown/W - 8:Brown
Presentation


44. Name the OSI Layers
Network
60
Shortest path first - (SPF)
(7)Application -(6)Presentation -(5)Session -(4)Transport - (3)Network - (2)Data Link - (1)Physical


45. Symbol for EIGRP on a Show ip route
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
/24
D
2 hosts


46. IEEE Standards: Fast Ethernet
Multicast packet used for discovery of neighbors sent every 5 seconds - on WAN links sent every 60 seconds
IEEE 802.3u
Router(config)#ip route {network address} {subnet-mask}
Packets


47. Rip Timers: How long is the default for Holddown timer.
Physical
180 seconds
Periodic Updates of their routing table
180


48. IEEE Standards: Gibabit Ethernet (Fibre)
Switch forwards the frame as soon as it can
1. Discovery packets - LSP built containing the state of each link - Flood LSP to neighbors - Build Link-state database
30 per network
IEEE 802.3z


49. Subnetting: where do the networks break with a /29

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

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