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N10-008 > Ethernet Fundamentals > Flashcards

Ethernet Fundamentals Flashcards

1
Q

10BASE-T

A

Cat3; 10 mbps 100 meters

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2
Q

Carrier Sense Multiple Access with Collision Detection (CSMA/CD)

A

Prevents collisions by using carrier-sensing to defer transmissions until no other stations are transmitting; waiting for the gap in the convo to speak; if you speak when another person speaks, you wait and try again later

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3
Q

Collision Domain

A

each area of the network that shares a single segment; any time you have devices on the same hub, you are sharing the same collision domain; devices operate in half duplex when connected to a hub

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4
Q

Ethernet switch

A

increases scalability of a network by creating multiple collision domains; every switch port is its own collision domain; full duplex

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5
Q

bandwidth

A

measures how many bits the network can transmit per second

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6
Q

100BASE-FX

A

MMF
100 Mbps
2 Kilometers

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7
Q

100BASE-SX

A

MMF
100 Mbps
300 Meters

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8
Q

1000BASE-SX

A

MMF
1000 Mbps
220-500 Meters

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9
Q

1000BASE-LX

A

SMF/MMF
1000 Mbps
5 Kilometers/550 meters

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10
Q

10GBASE-SR

A

MMF
10 Gbps
400 Meters

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11
Q

10GBASE-LR

A

SMF
10 Gbps
10 Kilometers

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12
Q

If you see S in the name for Fiber, it must be MMF

A

Don’t forget that!

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13
Q

Hub

A

Also known as a multiport repeater. It is a layer 1 devices that connects multiple network devices and workstations

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14
Q

Smart Hub

A

Active hub with enhanced features like SNMP

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15
Q

Bridge

A

Analyzes source MAC addresses and makes intelligent forwarding decisions based on the destination MAC in the frames

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16
Q

Switch

A

Also known as a multiport bridge, it is a layer 2 device

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17
Q

Router

A

Layer 3 Device that connect muliple networks and makes forwarding decisions based on logical network infomation

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18
Q

Layer 3 Switch

A

Makes Layer 3 routing decisions and then interconnects entire networks, not just network segments; just combines a switch and a router

19
Q

Link Aggregation (IEEE 802.3ad)

A

combines multiple physical connections into a single logical connection to minimize or prevent congestion

20
Q

Power Over Ethernet (PoE 802.3af - 15.4 watts, PoE+ 802.3at - 25.5 watts)

A

Supplies electrical power over ethernet and requires Cat 5 or higher copper cable

21
Q

Port Monitoring or Mirroring

A

Makes a copy of all traffic destined for a port and sends it to another port

22
Q

User Authentication (802.1x)

A

Requires users to authenticate themselves before gaining access to the network

23
Q

Management Access and Authentication

A

SSH - Remote Admin program that allows connection to the switch over the network
or a Console Port - allows for local admin of the switch using a separate laptop and a rollover cable (DB9 to RJ45)

24
Q

OOB (out of band) management

A

keeps all network configuration devices on a separate network

25
Q

First Hop Redundancy

A

Uses Hot Standby Router Protocol (HRSP) to create virtual IP and MAC addresses to provide active and standby routers

26
Q

MAC Filtering

A

permits or denies traffic based on device’s MAC address

27
Q

Traffic Filtering

A

Permits or denies traffic based on IP addresses or application ports

28
Q

Quality of Service (QoS)

A

Forwards traffic based on priority markers

29
Q

Spanning Tree Protocol (802.1d)

A

Permits redundant links between switches and prevents looping of network traffic

30
Q

Broadcast Storm

A

Multiple copies of frames being forwarded back and forth which then consumes the network

31
Q

Link Cost

A

Faster cables have lower cost, while slower cables have higher cost

32
Q

VLAN

A

Allows different logical networks to share the same physical hardware and provides added security and efficiency

33
Q

VLAN Trunking (802.1q)

A

Multiple VLANs transmitted over the same physical cable

34
Q

VPN

A

creates a secure VPN tunnel over a public network

35
Q

VPN concentrator

A

Terminates VPN tunnels and allows for multiple VPN connections in one location

36
Q

VPN Headend

A

a specific type of VPN concentrator

37
Q

Firewall

A

placed at the boundary of your network; inside to outside or outside to inside

38
Q

Next Gen Firewall (NXGF)

A

works at layer 7; detects and prevents attacks

39
Q

Proxy Server

A

A specialized device that makes requests to an external network on behalf of a client

40
Q

Load Balancer

A

Distributes incoming requests across various servers in a server farm

41
Q

Content Engine/Caching Engine

A

Dedicated appliance that performs the caching functions of a proxy server

42
Q

ICS

A

Industrial Control System - Describes the different types of control systems and associated instrumentation

43
Q

SCADA

A

Supervisory Control and Data Acquisition - Acquires and transmits data from different systems to a central panel for monitoring and control

N10-008 (21 decks)

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