Test your basic knowledge |

Ethernet Technologies

Subject : it-skills

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 name of the CEF engine that forwards packets in hardware?
Switch(config)#errdisable detect cause vmps
Accelerated CEF (aCEF) and Distributed CEF (dCEF)
The Layer 3 forwarding engine
Switch#show ip cef {interface} [detail]

2. When are mode-conditioning patch leads required with 1000BASE-LX/LH transceivers?
The CEF epoch number
With MMF cables shorter than 100 metres (to prevent over-driving the far-end receiver) and with MMF cables longer than 300 metres (to lessen the effect of differential mode delay)
Switch(config)#no ip cef
Gigabit Ethernet over 1 pair Shielded Twisted Pair (STP) cabling

3. What is the DTP negotiation mode of a switch port configured as static access?
Off
Incomplete adjacency; Incomplete ARP resolution; Unsupported packet features; ICMP redirect; Packets destined to the router itself; IP options present; Access list evaluation failure; Fragmentation failure
Numeric values that represent what action to take after the TCAM lookup occurs
From 30 seconds to 86 -400 seconds (24 hours)

4. What packets are immediately sent to the CEF Layer 3 engine for further processing?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

5. What are the types of layer 3 switched interfaces
Fast Ethernet over 2 pairs EIA/TIA Category 3 - 4 - 5 UTP
Switch(config)#errdisable detect cause bpduguard
Creating the VLAN
SVI or native routed interface

6. What is the content of TCAM Result entries?
ARP requests and replies; IP packets requiring an ICMP response; IP broadcasts to be relayed; Routing protocol updates; CDP packets; Packets needing encryption; Packets triggering NAT; Other non-IP packets
10 Gigabit Ethernet over copper CX4 with Infiniband connectors
Switch(config)#errdisable recovery interval {seconds}
Numeric values that represent what action to take after the TCAM lookup occurs

7. What is the original standard for Ethernet (10 Mbps)?
IEEE 802.3
SC or MT-RJ
7 100BASE-T2 full duplex; 6 100BASE-TX full duplex; 5 100BASE-T2 half duplex; 4 100BASE-T4; 3 100BASE-TX; 2 10BASE-T full duplex; 1 10BASE-T
Fast Ethernet over 62.5/125 micron multimode fibre (MMF) or 9 micron singlemode fibre (SMF)

8. What is 10GBASE-SR/SW?
10 Gigabit Ethernet over 50 or 62.5 micron MMF (850 nm serial laser)
Switch(config)#interface vlan {vlan-id}
Interconnecting switches in a campus network
Dynamic

9. What are the letters used with 10GBASE-X two-letter suffixes to specify the PHY type?
SVI
IEEE 802.3ae
R = LAN PHY; W = WAN PHY
Switch(config-if)#no switchport

10. Enables error-disable for the presence of invalid GBIC or SFP modules
Routing table and ARP table
Switch(config)#errdisable detect cause gbic-invalid
Cabling specifications for 10 Gigabit Ethernet
Gigabit Ethernet over 1 pair 8 or 9 micron SMF (1550 nm laser)

11. What are the common PMD types for 10 Gigabit Ethernet?
10GBASE-SR/SW - 10GBASE-LR/LW - 10GBASE-ER/EW - 10GBASE-LX4/LW4 - 10GBASE-CX4
Fast Ethernet over 62.5/125 micron multimode fibre (MMF) or 9 micron singlemode fibre (SMF)
ANSI X3T11 FibreChannel
Switch(config)#errdisable detect cause unicast-flood

12. What is 1000BASE-SX?
Gigabit Ethernet over 1 pair 50 or 62.5 micron MMF (850 nm laser)
A three-fold combination of 0 - 1 and X (don't care)
By Mask/Value - where each unique mask has eight value patterns associated with it
15 metres

13. What is TCAM?
66-300 metres for 50 micron MMF; 33 metres for 62.5 micron MMF
Cisco Express Forwarding
Ternary Content-Addressable Memory
Switch(config)#errdisable detect cause dtp-flap

14. What technology was merged into the IEEE 802.3 Ethernet standard to create Gigabit Ethernet?
Trunk
ANSI X3T11 FibreChannel
Electromagnetic Interference
Fast Ethernet over 2 pairs EIA/TIA Category 3 - 4 - 5 UTP

15. What CEF optimisation technique cache FIB entries in switch line cards?
Only temporarily for debugging purposes
Accelerated CEF (aCEF)
Half duplex
Switch(config-if)#description {string}

16. Enables error-disable for errors with offering inline power
A proprietary connector with a high-data-rate copper cable with enhanced signal integrity and EMI performance
UTP Fast Ethernet and Gigabit Ethernet
Off
Switch(config)#errdisable detect cause ilpower

17. What information is stored in CAM?
10 Gigabit Ethernet over 50 or 62.5 micron MMF or 9 micron SMF (1300 nm WWDM laser)
Switch(config)#errdisable detect cause storm-control
The table of learned MAC addresses - ports - and VLAN information
Static access or dynamic

18. Where is source and destination addresses and other relevant protocol information for access lists stored in the TCAM table?
Creating the VLAN
Switch(config)#errdisable detect cause dhcp-rate-limit
SVI
In TCAM Value entries

19. Enables error-disable when trunking encapsulation is flapping from one type to another
Switch(config)#errdisable detect cause channel-misconfig
Switch(config)#errdisable detect cause dtp-flap
Switch(config)#errdisable detect cause ilpower
Switch(config)#errdisable recovery cause {all | {cause-name}}

20. What is FIB?
The Layer 3 forwarding engine
Fast Ethernet over 2 pairs EIA/TIA Category 3 - 4 - 5 UTP
Forwarding Information Base
ARP requests and replies; IP packets requiring an ICMP response; IP broadcasts to be relayed; Routing protocol updates; CDP packets; Packets needing encryption; Packets triggering NAT; Other non-IP packets

21. What is 10GBASE-LR/LW?
10 Gigabit Ethernet over 9 micron SMF (1550 nm serial laser)
Process the first packet in a traffic flow to determine the destination
Static access
10 Gigabit Ethernet over 9 micron SMF (1310 nm serial laser)

22. Displays administrative and operational status for a specified interface
Static access or dynamic
On
Switch#show interfaces {interface}
Listen to the first packet and put its resulting destination in the MLS cache; Route subsequent packets in the same flow based on the MLS cache

23. Sets the speed of a Fast Ethernet or Gigabit Ethernet interface
Gigabit Ethernet over 4 pairs EIA/TIA Category 5 UTP
Switch(config-if)#speed {10 | 100 | 1000 | auto}
Switch(config)#interface range macro {name}
They are dropped (ARP throttling)

24. Displays switch port information for a specified interface
Switch#show interfaces {interface} switchport
Switch(config)#errdisable detect cause storm-control
Switch(config)#errdisable detect cause vmps
Switch(config)#errdisable detect cause {all | {cause-name}}

25. Removes entries from the CAM table
The Layer 3 forwarding engine
Half duplex
Ingress queueing; Destination MAC lookup (CAM); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Egress queueing
Switch#clear mac address-table [dynamic] [address {mac-address}] [interface {interface}] [vlan {vlan}]

26. Displays interface configuration information
With a mask value in addition to binary values to decide which keys in a table are relevant
Switch#show running-config interface {interface}
Switch(config)#mac address-table static {mac-address} vlan {vlan} interface {interface}
The Layer 3 forwarding engine

27. What are the Fast Ethernet autonegotiation selection priorities?
7 100BASE-T2 full duplex; 6 100BASE-TX full duplex; 5 100BASE-T2 half duplex; 4 100BASE-T4; 3 100BASE-TX; 2 10BASE-T full duplex; 1 10BASE-T
Gigabit Ethernet over 1 pair 50 or 62.5 micron MMF or 9 micron SMF (1300 nm laser)
Compiling Access Control Entries (ACE) into the TCAM table
Switch(config)#interface vlan {vlan-id}

28. What combinations are TCAM entries composed of?
The Discard adjacency
Value - Mask - and Result (VMR)
Switch(config)#errdisable detect cause dhcp-rate-limit
When one station transmits at the same time as another on a shared medium

29. What is 100BASE-TX?
The switch port falls back to default setting of half duplex
Fast Ethernet over 2 pairs EIA/TIA Category 5 UTP
Switch(config)#errdisable detect cause gbic-invalid
Switch(config)#errdisable detect cause pagp-flap

30. What is a ternary combination?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

31. What is the TCAM Value and Mask for an Ethernet access list?
Layer 2 source and destination MAC addresses; Layer 3 Time-To-Live (TTL) value and header checksum
Switch#show interfaces {interface}
Source MAC (/48); Destination MAC (/48); Ethertype (/16)
Cabling specifications for Gigabit Ethernet

32. What are the basic operations that a frame undergoes as it passes through a multilayer switch?
Switch(config)#errdisable detect cause {all | {cause-name}}
Static access or trunk
10 Gigabit Ethernet over 50 or 62.5 micron MMF or 9 micron SMF (1300 nm WWDM laser)
Ingress queueing; Destination MAC lookup (CAM); Destination IP lookup (FIB); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Layer 3 packet rewrite; Egress queueing

33. What is the name of a Layer 3 logical interface on a switch that represents an entire VLAN?
Cabling specifications for 10 Gigabit Ethernet
SVI
A switch port that has been shut down automatically due to a serious error condition
Configure the appropriate values manually on both ends of the link

34. Selects a switch port interface and enters interface configuration mode
Switch(config)#interface {type}{module}/{number}
FIB with adjacency table
Cisco Express Forwarding
Listen to the first packet and put its resulting destination in the MLS cache; Route subsequent packets in the same flow based on the MLS cache

35. Enables error-disable for when the port link state is flapping between the up and down states
Listen to the first packet and put its resulting destination in the MLS cache; Route subsequent packets in the same flow based on the MLS cache
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Switched virtual interface (SVI)
Switch(config)#errdisable detect cause link-flap

36. What are the symptoms of a duplex setting mismatch between two ends of a link?
Switch(config)#interface vlan {vlan-id}
Source IP (/32); Destination IP (/32); Protocol (/16); IP ToS (/8)
When there are more access list entries and Layer 4 operations than available Mask/Value and LOU entries
Slow response times - low throughput - runts and other input errors on the switch ports

37. Displays CEF Drop statistics with number of packets and reason for each line card
XENPAK - X2 - or SFP+
Switch(config)#errdisable detect cause vmps
Interconnecting switches in a campus network
Switch#show cef drop

38. What information is stored in TCAM?
Switch(config)#mac address-table static {mac-address} vlan {vlan} interface {interface}
Gigabit Ethernet over 4 pairs EIA/TIA Category 5 UTP
Security and QoS ACLs
SVI

39. Displays a list of all interfaces in an error-disabled state
On
Cabling specifications for Gigabit Ethernet
Switch#show interfaces status err-disabled
Switch#show adjacency [{interface}] [summary | detail]

40. What is 100BASE-T2?
LOU registers
Native routed interface
Fast Ethernet over 2 pairs EIA/TIA Category 3 - 4 - 5 UTP
Switch#show ip cef {interface} [detail]

41. What are the reasons for packets being dropped by CEF?
Feature Manager (FM) and Switching Database Manager (SDM)
The Layer 3 forwarding engine
Interconnecting with existing Synchronous Optical Network (SONET) or Synchronous Digital Hierarchy (SDH) networks
Encapsulation failure; Unresolved address; Unsupported protocol; No valid route; No valid adjacency; Checksum error

42. What are the common cabling specifications for Fast Ethernet?
Switch#show mac address-table count [address {mac-address}] [interface {interface}] [vlan {vlan}]
100BASE-TX - 100BASE-T2 - 100BASE-T4 and 100-BASE-FX
Ternary Content-Addressable Memory
Per port collision domains; Full duplex mode; Dedicated bandwidth; Error detection; Broadcast thresholds; Intelligent filtering and forwarding

43. What is IEEE?
Institute of Electrical and Electronics Engineers
Fast Ethernet over 4 pairs EIA/TIA Category 3 - 4 - 5 UTP
100BASE-TX - 100BASE-T2 - 100BASE-T4 and 100-BASE-FX
Cabling specifications for Gigabit Ethernet

44. What are GigaStack GBICs used for?
Switch(config-if)#duplex {auto | full | half}
GBIC-to-GBIC connection between stacking Catalyst switches or between any two Gigabit switch ports over a short distance
Switch(config)#errdisable detect cause l2ptguard
Incomplete adjacency; Incomplete ARP resolution; Unsupported packet features; ICMP redirect; Packets destined to the router itself; IP options present; Access list evaluation failure; Fragmentation failure

45. What is the prerequesite for creating a working SVI?
Creating the VLAN
Compiling Access Control Entries (ACE) into the TCAM table
Forwarding Information Base
The table of learned MAC addresses - ports - and VLAN information

46. What is the maximum cabling distance for 1000BASE-LX/LH?
Content-Addressable Memory
Native routed interface
Layer 2 destination address changed to next-hop MAC address; Layer 2 source address changed to outbound interface MAC address; Layer 3 TTL decremented by 1; Layer 3 IP checksum recalculated; Layer 2 frame checksum recalculated
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF

47. What is 1000BASE-T?
The Punt adjacency
Switch(config)#errdisable detect cause ilpower
Switch(config)#define interface-range {macro-name} {type} {module}/{number} [- {number}] [ - {type} {module}/{number} ...]
Gigabit Ethernet over 4 pairs EIA/TIA Category 5 UTP

48. What is the TCAM Value and Mask for an IGMP access list?
Carrier Sense Multiple Access Collision Detection
15 metres
Source IP (/32); Destination IP (/32); Protocol (/16); IP ToS (/8); IGMP message type (/8)
Switch(config)#interface range {type}{module}/{number} [- {number}] [ - {type}{module}/{number} ...]

49. Disables a switch port
Switch#show ip cef
Ingress queueing; Destination MAC lookup (CAM); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Egress queueing
Switch(config-if)#shutdown
300 seconds

50. What are the supported duplex mode settings for Gigabit Ethernet on Cisco switches?
Full duplex only
Layer 2 source and destination MAC addresses; Layer 3 Time-To-Live (TTL) value and header checksum
The CEF epoch number
10 km