Network Devices - 2.2

Question 1

Routers

Answer 1

Routes traffic between IP subnets | makes forwarding decisions based on IP address | also known as “Layer 3 switches”.

Question 2

Unmanaged Switch

Answer 2

1. Very few configuration options
2. Fixed configuration
3. very little integration with other devices
4. low price point

Question 3

Managed switch

Answer 3

1. VLAN support
2. Traffic prioritization (voice traffic gets higher priority)
3. Redundancy support (Spanning Tree Protocol)
4. Port mirroring
5. External Management (Simple network management protocol (SNMP))

Question 4

Firewalls

Answer 4

Filters traffic by port number - OSI Layer 4 (TCP/UDP) | Can encrypt traffic into/out of the network | Can proxy traffic | Can be a layer 3 device (Only in Routers)

Question 5

PoE

Answer 5

Standard: IEEE 802.3af-2003, now part of the 802.3 standard. 15.4 watts of DC power, 350 mA max current

Question 6

PoE+

Answer 6

IEEE 802.3at-2009, part of the 802.3 standard | 25.5 watts DC power, 600mA max current

Question 7

PoE++

Answer 7

IEEE 802.3bt-2018 | 51 W (Type 3), 600 mA max current | 71.3 W (Type 4), 960 mA max current | PoE with 10GBASE-T

Question 8

Hub

Answer 8

Multi-port repeater | Everything is half-duplex | Announces to every port | 10 megabit / 100 megabit

Question 9

Cable Modem

Answer 9

Transmission across multiple frequency | DOCSIS (Data over cable service interface specification) | High-speed networking : speeds up to 1 gigabit/s are available | Multiple service: Data, Voice, Video

Question 10

DSL modem

Answer 10

ADSL (Asymmetric Digital Subscriber Line) | Uses telephone line | Download speed is faster than upload speed | Common speed: 52 Mbit/s downstream, 16 Mbit/s upstream | Faster if closer to central office (CO)

Question 11

ONT

Answer 11

Optical Network Terminal | Connect the ISP fiber network to the copper network, Demarcation point (DEMARC) in the data center | Box is outside of your house | Any wiring inside your house is your responsibility until the point of the DEMARC

Question 12

NIC (Network Interface Card)

Answer 12

The fundamental network device