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Network + > Ethernet > Flashcards

Ethernet Flashcards

1
Q

10Base-T ethernet

A

Unshielded twisted pair
10Mbps
100 meters

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2
Q

Deterministic access

A

Requires electronic token to transmit (token ring)

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3
Q

Contention-based access

A

Chaotic

Transmit whenever you want (Ethernet)

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4
Q

CSMA/CD access

A

Carrier Sense multiple Access/Collision Detect

Listening to wire, talk when there is an open gap

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5
Q

Collision domains

A

Every device on the same cable or hub

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6
Q

Ethernet speed

A

10 Mbps

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7
Q

Fast Ethernet speed

A

100 Mbps

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8
Q

Gigabit Ethernet speed

A

1 Gbps

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9
Q

Bandwidth

A

How many bits the network can transmit in 1 second

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10
Q

VLAN

A

Virtual LAN

Allows different logical networks to share the same physical hardware

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11
Q

VLAN trunking

A

802.1q

multiple VLANs transmitted over the same physical cable

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12
Q

STP

A

Spanning Tree Protocol
802.1D
Prevents looping of network traffic

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13
Q

Broadcast storm

A

Switches forward duplicate frame to each other

Eventually network is consumed by initial frame

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14
Q

Root bridge

A

Switch to act as reference point in spanning tree

Lowest bridge ID (BID)

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15
Q

Root port

A

Port on non-root bridge closest to root bridge in terms of cost

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16
Q

Designated port

A

Each network segment has a designated port
Closest to root bridge in terms of cost
All ports on root bridge are designated ports

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17
Q

Non-designated port

A

Block traffic to create loop free topology

Can transition to a forwarding state if failure detected

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18
Q

4 states of non-designated port becoming active

A

Blocking
Listening
Learning
Forwarding

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19
Q

Link cost

A

Lower speed = higher cost

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20
Q

802.3d

A

Link Aggregation
Allows for multiple physical connection into single logical connection
Bandwidth increased
Congestion decreased

21
Q

PoE 802.3af

A

Power over Ethernet
CAT5 or higher
15.4 watts of power

22
Q

PoE+ 802.3at

A

25.5 watts of power

23
Q

Port monitoring

A

Port mirroring
Analyze packet flow
Copies all traffic from one port and sends it to another

24
Q

802.1x

A

User Authentication

Switches must authenticate themselves before gaining access to network

25
Q

Console port

A

Local administration of switch using separate laptop and roller over cable

26
Q

SSH

A

Remote administration of switch over network

27
Q

OOB

A

Out of Band management network

Keeps all network configuration devices on separate network

28
Q

HSRP

A

Hot Standby Router Protocol
First hop redundancy
Cisco proprietary
Uses virtual IP and MAC addresses to provide active router and standby router

29
Q

MAC filtering

A

Permit or deny traffic based on MAC address

30
Q

Traffic filtering

A

Multilayer switches permit or deny traffic based on IP addresses or application ports

31
Q

VPN Concentrator

A

Device that can terminate VPN tunnels

32
Q

Stateful Firewall

A

Allows traffic out of network to internet

Blocks traffic from internet into network

33
Q

NGFW

A

Next Generation Firewall
Deep packet inspection
More powerful than stateless or stateful firewalls

34
Q

IDS/IPS

A

Intrusion Detection or Prevention System
IDS recognizes attacks
IPS recognizes and responds to attacks

35
Q

FQDN

A 
Fully Qualified Domain Name
Domain name under top-layer domain 
.com
.edu
.org etc
36
Q

URL

A

Uniform resource locator

Contains FGDN with method to access information

37
Q

DNS “A” Record

A

IPv4 address

38
Q

DNS “AAAA” Record

A

IPv6 address

39
Q

DNS CNAME Record

A

Alias for existing network (liberty.edu)

40
Q

DNS MX Record

A

Mail exchange

41
Q

DNS NS Record

A

Authoritative name server for the domain

42
Q

DNS PTR Record

A

Pointer record refers to canonical name - reverse DNS lookup

43
Q

DNS SOA record

A

Start of Authority

Authoritative info about DNS zone - contact info, primary name server, refresh times

44
Q

DHCP

A

Domain Host Configuration Protocol

Devices on network automatically receive IP address, subnet mask, default gateways, DNS server addresses

45
Q

DHCP DORA

A

Discover
Offer
Request
Pack

46
Q

Proxy Server

A

Device makes request to external network on behalf of a client
Used for security to perform content filtering and logging

47
Q

Content Engine

A

Caching engine

Performs caching functions of proxy server - more efficiently

48
Q

Content Switches

A

Load balancer

Distributes requests across various servers in farm

Network + (16 decks)

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