Network Devices 2.2 - PM Flashcards
What does a router do?
forwards traffic between different IP subnets (based on IP)
Can a router as a single device connect different network types?
Yes, such as WAN, LAN, copper and fiber
What’s the difference between a router and a switch in how they forward data?
A router looks at the destination IP address to forward traffic
A switch looks at the destination MAC address
What’s the difference between unmanaged and managed switches?
An unmanaged switch has no configuration options, no protocols available
A managed switch allows configuration (like VLANS), port mirroring, external management (SNMP), etc used for large orgs
What’s the difference between an access point and a wireless router?
An access point only provides a link between a wired network and a wireless network (a bridge)
Cable runs from a desk area are punched down permanently to what part of the patch panel?
the back
What side are the RJ-45 connectors on the patch panel located?
RJ-45 connectors in the front, connections are then made to switches
What does a firewall do?
It allows/disallows traffic based on IP address and port numbers
What OSI layer is a firewall (standalone)?
OSI layer 4 because it filters traffic by port number
[Transport Layer]
How can a firewall also function as a layer 3 device?
it can be integrated into SOHO routers
[Network layer]
A firewall that can understand application layer traffic are called what?
Layer 7 devices
[Application Layer]
What are PoE injectors? What are they also called?
Also called midspans, they’re placed in the middle between a switch and device connection to provide power to the ethernet cable (PoE)
What are PoE endspans?
Built-in power is provided by the switch (Power over Ethernet)
[doesn’t need middleman]
How does a switch tell you which interfaces support PoE?
The blue line across the top of the ports (supports PoE)
What types of traffic are being communicated over a single cable in broadband communication?
video signals, phone lines, Internet are communicated in broadband communication and then devices can connect to the cable modem to access that data
What is the standard for sending data over cable? What does it stand for?
DOCSIS
Data over Cable Service Interface Specification
Cable modems support up to what speeds?
1 Gbps
What does ADSL stand for?
Asymmetrical Digital Subscriber Line
What makes a connection asymmetrical?
The download speed is much faster than the upload
What’s the distance limitation for DSL before the signal gets too weak to receive data?
10,000 feet from the central office
What is the delivery method for fiber networks?
They use an ONT - optical network terminal that converts fiber network to home network (like copper cable network)
(fiber to the premises)
What does NIC stand for?
Network Interface card
What types of NICs are available?
different ones for different network types (Ethernet, WAN, wireless, etc)
Every device on a network has a ____ in order to connect to it
NIC
Does a fiber network need a NIC?
yes, just like copper
