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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. Configures the maximum ageing time for entries in the MAC address table
10 Gigabit Ethernet over 50 or 62.5 micron MMF or 9 micron SMF (1300 nm WWDM laser)
Switch(config)#mac address-table aging-time {seconds}
IEEE 802.3
ANSI X3T11 FibreChannel

2. Displays the entire Forwarding Information Base (FIB)
70 km for 9 micron SMF; 100 km for 8 micron SMF
Switch#show ip cef
Switch#show mac address-table count [address {mac-address}] [interface {interface}] [vlan {vlan}]
A name assigned to a ranges of interfaces

3. What is the maximum cabling distance for 10GBASE-LR/LW?
400 metres half duplex and 2000 metres full duplex
10 km
Encapsulation failure; Unresolved address; Unsupported protocol; No valid route; No valid adjacency; Checksum error
10 Gigabit Ethernet over 50 or 62.5 micron MMF (850 nm serial laser)

4. What is the TCAM Value and Mask for an IP access list?
Switch(config)#errdisable detect cause link-flap
Switch(config)#errdisable recovery interval {seconds}
Source IP (/32); Destination IP (/32); Protocol (/16); IP ToS (/8)
Carrier Sense Multiple Access Collision Detection

5. How is link duplex mode determined on Fast Ethernet links configured to autonegotiate?
Switch(config-if)#switchport access vlan {vlan}
Through exchange of information - which means that for one end to successfully negotiate duplex mode the other end must also be set to autonegotiate
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
Switch(config)#interface range macro {name}

6. What is 100BASE-T2?
10 Gigabit Ethernet over 9 micron SMF (1550 nm serial laser)
Through exchange of information - which means that for one end to successfully negotiate duplex mode the other end must also be set to autonegotiate
Fast Ethernet over 2 pairs EIA/TIA Category 3 - 4 - 5 UTP
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

7. What is LOU?
Switch(config)#errdisable detect cause unicast-flood
Logical Operation Unit
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Gigabit Ethernet over 1 pair 50 or 62.5 micron MMF (850 nm laser)

8. What is 10GBASE-ER/EW?
Per port collision domains; Full duplex mode; Dedicated bandwidth; Error detection; Broadcast thresholds; Intelligent filtering and forwarding
10 Gigabit Ethernet over 9 micron SMF (1550 nm serial laser)
Switch(config-if)#duplex {auto | full | half}
When one station transmits at the same time as another on a shared medium

9. What is 10GBASE-X?
Partition and tune the TCAM on some Catalyst switches into areas for different functions
Enable error-disable for all possible causes
Cabling specifications for 10 Gigabit Ethernet
400 metres half duplex and 2000 metres full duplex

10. What is WAN PHY used for?
A name assigned to a ranges of interfaces
Interconnecting with existing Synchronous Optical Network (SONET) or Synchronous Digital Hierarchy (SDH) networks
Gigabit Ethernet over 4 pairs EIA/TIA Category 5 UTP
The switch port falls back to default setting of half duplex

11. What is the timer range for automatic re-enabling of error-disabled ports?
From 30 seconds to 86 -400 seconds (24 hours)
Switch(config-if)#description {string}
The Null adjacency
40 km

12. What is 1000BASE-X?
IEEE 802.3ae
Cabling specifications for Gigabit Ethernet
Cabling specification for 10 Mbps Ethernet over Unshielded Twisted Pair (UTP) cabling
Interconnecting with existing Synchronous Optical Network (SONET) or Synchronous Digital Hierarchy (SDH) networks

13. What denotes the number of times the CEF table has been flushed and regenerated as a whole?
The CEF epoch number
Switch#show ip cef {network} [{mask}] [longer-prefixes] [detail]
Switch(config)#errdisable detect cause dtp-flap
Switch(config)#interface range {type}{module}/{number} [- {number}] [ - {type}{module}/{number} ...]

14. What is the maximum cabling distance for 10GBASE-LX4/LW4?
Gigabit Interface Converter (GBIC) or Small Form factor Pluggable (SFP)
300 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
SVI
10 km

15. What are the 100BASE-FX connectors used in Cisco Catalyst switches?
Electromagnetic Interference
The switch port falls back to default setting of half duplex
SC or MT-RJ
Static access - trunk - tunnel or dynamic

16. What is the operational mode of a switch port that is a member of one VLAN?
Interconnecting with existing Synchronous Optical Network (SONET) or Synchronous Digital Hierarchy (SDH) networks
Ternary Content-Addressable Memory
Static access
Switch(config)#errdisable detect cause vmps

17. What is the original standard for Ethernet (10 Mbps)?
Security and QoS ACLs
IEEE 802.3
Partition and tune the TCAM on some Catalyst switches into areas for different functions
Switch(config)#errdisable detect cause vmps

18. What is the TCAM Value and Mask for an IGMP access list?
Source IP (/32); Destination IP (/32); Protocol (/16); IP ToS (/8); IGMP message type (/8)
Process the first packet in a traffic flow to determine the destination
Switch#show ip cef {interface} [detail]
The Layer 3 engine

19. Enables error-disable for misconfiguration of EtherChannel bundles
Switch(config)#errdisable detect cause channel-misconfig
1 -2 on one end with 3 -6 on the other end
Store-and-forward
Half duplex

20. What CEF optimisation technique cache FIB entries in switch line cards?
Through exchange of information - which means that for one end to successfully negotiate duplex mode the other end must also be set to autonegotiate
Trunk or dynamic
R = LAN PHY; W = WAN PHY
Accelerated CEF (aCEF)

21. Displays dynamic CAM table entries
Switch#show mac address-table dynamic [address {mac-address}] [interface {interface}] [vlan {vlan}]
Adjacent MAC address (6 octets); Layer 3 engine MAC address (6 octets); EtherType (2 octets)
Cabling specifications for 10 Gigabit Ethernet
10 km

22. What is the standard for 10 Gigabit Ethernet (10GbE)?
By electrical signalling so that either end of a link can determine what speed the other end is trying to use
Switch#show cef drop
Source IP (/32) - Destination IP (/32) - Protocol (/16) - IP ToS (/8) - Source port (/16) - Source operator (/4) - Destination port (/16) - Destination operator (/4)
IEEE 802.3ae

23. What is the maximum cabling distance for Ethernet - Fast Ethernet and Gigabit Ethernet over UTP cabling?
LAN PHY and WAN PHY
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Switch(config)#errdisable recovery cause {all | {cause-name}}
100 metres

24. What are the types of layer 3 switched interfaces
100 metres
IEEE 802.3u
SVI or native routed interface
Source MAC (/48); Destination MAC (/48); Ethertype (/16)

25. What are the Gigabit Ethernet autonegotiation selection priorities?
1000BASE-T full duplex followed by 1000BASE-T half duplex
Switch#show errdisable recovery
Switch#show mac address-table count [address {mac-address}] [interface {interface}] [vlan {vlan}]
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF

26. What type of packets can not be forwarded by CEF but are instead sent to the switch CPU for process switching in software?
300 seconds
Interconnecting switches in a campus network
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
Trunk or dynamic

27. What is FIB?
Full duplex only
Forwarding Information Base
Switch(config)#errdisable detect cause ilpower
On

28. Selects multiple switch port interfaces at the same time and enters interface configuration mode
Switch(config)#interface range {type}{module}/{number} [- {number}] [ - {type}{module}/{number} ...]
Fast Ethernet over 2 pairs EIA/TIA Category 3 - 4 - 5 UTP
Down - static access - trunk or tunnel
100BASE-TX - 100BASE-T2 - 100BASE-T4 and 100-BASE-FX

29. Enables error-disable for errors with offering inline power
SC fibre optic or RJ-45 UTP
Switch(config)#errdisable detect cause ilpower
Switch#show running-config interface {interface}
15 metres

30. What is CSMA/CD?
A three-fold combination of 0 - 1 and X (don't care)
In parallel revealing the best (longest) match in a single table lookup
Carrier Sense Multiple Access Collision Detection
Down - static access - trunk or tunnel

31. Displays the CAM table size with number of MAC addresses
Switch(config)#interface vlan {vlan-id}
SVI
Switch#show mac address-table count [address {mac-address}] [interface {interface}] [vlan {vlan}]
R = LAN PHY; W = WAN PHY

32. What tables are maintained by the CEF Layer 3 forwarding engine?
Multilayer Switching
Switch(config)#errdisable detect cause {all | {cause-name}}
Switch(config)#errdisable detect cause storm-control
FIB with adjacency table

33. Selects a switch port interface and enters interface configuration mode
Gigabit Interface Converter (GBIC) or Small Form factor Pluggable (SFP)
Switch(config)#interface {type}{module}/{number}
Creating the VLAN
Bundling together two to eight full duplex Fast Ethernet links to act as a single physical link

34. Enables error-disable when an STP BPDU is received from a root bridge on an unexpected port
10 Gigabit Ethernet over 50 or 62.5 micron MMF (850 nm serial laser)
Trunk or dynamic
Switch(config)#errdisable detect cause rootguard
Switch(config)#errdisable detect cause dhcp-rate-limit

35. What is 1000BASE-ZX?
Source IPX network (/32); Destination IPX network (/32); Destination node (/48); IPX packet type (/16)
Source IP (/32); Destination IP (/32); Protocol (/16); ICMP code (/8); ICMP type (/4); IP type of service (ToS) (/8)
Gigabit Ethernet over 1 pair 8 or 9 micron SMF (1550 nm laser)
Source IP (/32); Destination IP (/32); Protocol (/16); IP ToS (/8); IGMP message type (/8)

36. Displays CEF adjacency table information
Trunk
Switch#show adjacency [{interface}] [summary | detail]
The CEF entry version number
Packets that have been truncated before they were fully received

37. What is LAN PHY used for?
66-300 metres for 50 micron MMF; 33 metres for 62.5 micron MMF
Value - Mask - and Result (VMR)
Interconnecting switches in a campus network
Switch(config-if)#shutdown

38. What is the maximum cabling distance for 1000BASE-LX/LH?
550 metres for 50 or 62.5 micron MMF; 10 km for 9 micron SMF
Switch(config)#errdisable detect cause rootguard
Switch(config)#errdisable detect cause ilpower
400 metres half duplex and 2000 metres full duplex

39. What are the letters used with 10GBASE-X two-letter suffixes to specify the PHY type?
In parallel revealing the best (longest) match in a single table lookup
Compiling Access Control Entries (ACE) into the TCAM table
R = LAN PHY; W = WAN PHY
Switch#show ip cef {network} [{mask}] [longer-prefixes] [detail]

40. What happens when autonegotiating of link duplex mode fails on a Fast Ethernet link?
The switch port falls back to default setting of half duplex
10GBASE-SR/SW - 10GBASE-LR/LW - 10GBASE-ER/EW - 10GBASE-LX4/LW4 - 10GBASE-CX4
Encapsulation failure; Unresolved address; Unsupported protocol; No valid route; No valid adjacency; Checksum error
Switch(config)#errdisable detect cause bpduguard

41. What information is stored in TCAM?
A name assigned to a ranges of interfaces
Security and QoS ACLs
Dynamic
Creating the VLAN

42. What is MLS?
On
UTP Fast Ethernet and Gigabit Ethernet
Multilayer Switching
IEEE 802.3ae

43. Creates an interface-range macro
15 metres
Only temporarily for debugging purposes
Switch(config)#define interface-range {macro-name} {type} {module}/{number} [- {number}] [ - {type} {module}/{number} ...]
Static access or trunk

44. Enables error-disable when the Port Aggregation Protocol (PAgP) is flapping
Switch#show mac address-table static [address {mac-address}] [interface {interface}] [vlan {vlan}]
Switch(config)#errdisable detect cause pagp-flap
IEEE 802.3z
Ingress queueing; Destination MAC lookup (CAM); Destination IP lookup (FIB); Security ACL lookup (TCAM); QoS ACL lookup (TCAM); Layer 3 packet rewrite; Egress queueing

45. What mechanism does the TCAM provide for Layer 4 comparisons involving gt - lt - neq or range operators?
Cabling specifications for 10 Gigabit Ethernet
Switch#show adjacency [{interface}] [summary | detail]
LOU registers
Tunnel

46. Enables error-disable when trunking encapsulation is flapping from one type to another
Collision domain
Switch(config)#errdisable detect cause pagp-flap
Switch(config)#errdisable detect cause dtp-flap
Switch#show errdisable recovery

47. Displays interface configuration information
Numeric values that represent what action to take after the TCAM lookup occurs
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
SVI
Switch#show running-config interface {interface}

48. What is the maximum cabling distance for 10GBASE-ER/EW?
40 km
25 metres
Adjacent MAC address (6 octets); Layer 3 engine MAC address (6 octets); EtherType (2 octets)
In TCAM Value entries

49. What are the 10GBASE-X PMD transceiver form factors used in Cisco Catalyst switches?
Route caching and topology based
XENPAK - X2 - or SFP+
Only temporarily for debugging purposes
A switch port that has been shut down automatically due to a serious error condition

50. What is the standard for 1000BASE-T?
S = Short; L = Long; E = Extra-long
275 metres for 62.5 micron MMF; 550 metres for 50 micron MMF
LAN PHY and WAN PHY
IEEE 802.3ab