Ethernet

Question 1

10Base-T ethernet

Answer 1

Unshielded twisted pair
10Mbps
100 meters

Question 2

Deterministic access

Answer 2

Requires electronic token to transmit (token ring)

Question 3

Contention-based access

Answer 3

Chaotic

Transmit whenever you want (Ethernet)

Question 4

CSMA/CD access

Answer 4

Carrier Sense multiple Access/Collision Detect

Listening to wire, talk when there is an open gap

Question 5

Collision domains

Answer 5

Every device on the same cable or hub

Question 6

Ethernet speed

Answer 6

10 Mbps

Question 7

Fast Ethernet speed

Answer 7

100 Mbps

Question 8

Gigabit Ethernet speed

Answer 8

1 Gbps

Question 9

Bandwidth

Answer 9

How many bits the network can transmit in 1 second

Question 10

VLAN

Answer 10

Virtual LAN

Allows different logical networks to share the same physical hardware

Question 11

VLAN trunking

Answer 11

802.1q

multiple VLANs transmitted over the same physical cable

Question 12

STP

Answer 12

Spanning Tree Protocol
802.1D
Prevents looping of network traffic

Question 13

Broadcast storm

Answer 13

Switches forward duplicate frame to each other

Eventually network is consumed by initial frame

Question 14

Root bridge

Answer 14

Switch to act as reference point in spanning tree

Lowest bridge ID (BID)

Question 15

Root port

Answer 15

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

Question 16

Designated port

Answer 16

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

Question 17

Non-designated port

Answer 17

Block traffic to create loop free topology

Can transition to a forwarding state if failure detected

Question 18

4 states of non-designated port becoming active

Answer 18

Blocking
Listening
Learning
Forwarding

Question 19

Link cost

Answer 19

Lower speed = higher cost

Question 20

802.3d

Answer 20

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

Question 21

PoE 802.3af

Answer 21

Power over Ethernet
CAT5 or higher
15.4 watts of power

Question 22

PoE+ 802.3at

Answer 22

25.5 watts of power

Question 23

Port monitoring

Answer 23

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

Question 24

802.1x

Answer 24

User Authentication

Switches must authenticate themselves before gaining access to network

Question 25

Console port

Answer 25

Local administration of switch using separate laptop and roller over cable

Question 26

SSH

Answer 26

Remote administration of switch over network

Question 27

OOB

Answer 27

Out of Band management network | Keeps all network configuration devices on separate network

Question 28

HSRP

Answer 28

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

Question 29

MAC filtering

Answer 29

Permit or deny traffic based on MAC address

Question 30

Traffic filtering

Answer 30

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

Question 31

VPN Concentrator

Answer 31

Device that can terminate VPN tunnels

Question 32

Stateful Firewall

Answer 32

Allows traffic out of network to internet | Blocks traffic from internet into network

Question 33

NGFW

Answer 33

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

Question 34

IDS/IPS

Answer 34

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

Question 35

FQDN

Answer 35

``` Fully Qualified Domain Name Domain name under top-layer domain .com .edu .org etc ```

Question 36

URL

Answer 36

Uniform resource locator | Contains FGDN with method to access information

Question 37

DNS "A" Record

Answer 37

IPv4 address

Question 38

DNS "AAAA" Record

Answer 38

IPv6 address

Question 39

DNS CNAME Record

Answer 39

Alias for existing network (liberty.edu)

Question 40

DNS MX Record

Answer 40

Mail exchange

Question 41

DNS NS Record

Answer 41

Authoritative name server for the domain

Question 42

DNS PTR Record

Answer 42

Pointer record refers to canonical name - reverse DNS lookup

Question 43

DNS SOA record

Answer 43

Start of Authority | Authoritative info about DNS zone - contact info, primary name server, refresh times

Question 44

DHCP

Answer 44

Domain Host Configuration Protocol | Devices on network automatically receive IP address, subnet mask, default gateways, DNS server addresses

Question 45

DHCP DORA

Answer 45

Discover Offer Request Pack

Question 46

Proxy Server

Answer 46

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

Question 47

Content Engine

Answer 47

Caching engine | Performs caching functions of proxy server - more efficiently

Question 48

Content Switches

Answer 48

Load balancer | Distributes requests across various servers in farm