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Network+ > Section 6: Ethernet Fundamentals > Flashcards

Section 6: Ethernet Fundamentals Flashcards

1
Q

What is Carrier Sense Multiple Access/Collision Detect (CSMA/CD)?

A

It prevents collisions by using carrier-sensing to defer transmissions until no other stations are transmitting

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2
Q

What is the bandwidth capacity of an Ethernet?

A

10 Mbps

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3
Q

What is the bandwidth capacity of a Fast Ethernet?

A

100 Mbps

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4
Q

What is the bandwidth capacity of a Gigabit Ethernet?

A

1000 Mbps/1 Gbps

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5
Q

What is the bandwidth capacity of an 10-Gigabit Ethernet?

A

10 Gbps

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6
Q

What is the bandwidth capacity of a 100-Gigabit Ethernet?

A

100 Gbps

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7
Q

What media type, bandwidth capacity, and distance limitation is a 10BASE-T?

A

CAT 3 or higher, 10 Mbps, 100 m

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8
Q

What media type, bandwidth capacity, and distance limitation is a 100BASE-TX?

A

CAT 5 or higher, 100 Mbps, 100 m

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9
Q

What media type, bandwidth capacity, and distance limitation is a 1000BASE-TX?

A

CAT 6 or higher, 1 Gbps, 100 m

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10
Q

What media type, bandwidth capacity, and distance limitation is a 1000BASE-SX?

A

MMF, 1 Gbps, 220 m

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11
Q

What media type, bandwidth capacity, and distance limitation is a 1000BASE-LX?

A

MMF/SMF, 1 Gbps, 500 m/5 km

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12
Q

What media type, bandwidth capacity, and distance limitation is a 1000BASE-ZX?

A

SMF, 1 Gbps, 70 km

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13
Q

What is a Hub?

A

A Layer 1 device used to connect multiple network devices/workstations

Known as multiport repeaters

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14
Q

What is a Collision Domain?

A

Multiple network segments connected together by hubs

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15
Q

What are bridges?

A

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

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16
Q

What is a switch?

A

A layer 2 device used to connect multiple network segments together

Learn MAC addresses and make forwarding decisions based on them

17
Q

What is a router?

A

A layer 3 device used to connect multiple networks together

Makes forwarding decisions based on logical network address information

18
Q

What is a Layer 3 Switch?

A

Just like a layer 2 switch, but can also make routing decisions and interconnect entire networks.

19
Q

What is link aggregation (802.3ad)?

A

Allows for a combination of multiple physical connections into a single logical connection

20
Q

What is Power over Ethernet (PoE 802.3af, PoE+ 802.3at)?

A

Supplies electrical power over Ethernet

21
Q

What is the First-Hop Redundancy Protocol?

A

Uses virtual IP and MAC addresses to provide a “active router” and a “standby router”

Also known as a Hot Standby Router Protocol (HSRP)

22
Q

What is MAC Filtering?

A

Permits or denies traffic based on a device’s MAC address to improve security

23
Q

What is Quality of Service (QoS)?

A

Forwards traffic based on priority markings

24
Q

What is the Spanning Tree Protocol (STP) (802.1D)?

A

Permits redundant links between switches and prevents traffic loops

25
What are **broadcast storms**?
Multiple copies of frame are forwarded, replicated, and forwarded again until the network is consumed with forwarding many copies of the same initial frame
26
What is a **Virtual Local Area Network (VLAN)**?
Allows different logical networks to share the same physical hardware and provides added security and efficiency
27
What is **VLAN Trunking (802.1q)**?
Multiple VLANs transmitted over the same physical cable
28
What is a **Virtual Private Network (VPN)**?
A secure virtual tunnel over an untrusted network like the Internet
29
What is a **VPN Headend**?
A specific type of VPN concentrator used to terminate IPSec VPN tunnels within a router or other device
30
What is a **Firewall**?
A network security appliance placed at the boundary of a network
31
What is a **Next-Generation Firewall (NGFW)**?
Conducts a deep packet inspection at Layer 7 and can look through traffic to detect and prevent attacks | Much more powerful than basic stateless or stateful firewalls
32
What is the **Intrusion Detection/Prevention System**?
Recognizes attacks through signatures and anomalies
33
What is a **Proxy server**?
A specialized device that makes requests to an external network on behald of a client
34
What is a **Load Balancer**?
Distributes incoming requests across various servers in a server farm
35
What is a **VoIP Phone**?
A hardware device that connects to your IP network to make a connection to a call manager within your network.
36
What is the **Industrial Control System (ICS)**?
Describes the different types of control systems and associated instrumentation
37
What is a **Supervisory Control and Data Acquisition (SCADA)**?
Acquires and transmits data from different systems to a central panel for monitoring and control.

Network+ (22 decks)

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