Section 2.1 Flashcards
What do hubs do?
They repeat data to every port
What does a bridge do?
bridge two LAN segments, each with their own collision domains, and forward data with MAC addresses
What do switches do?
They forward data based on MAC addresses
What do routers do?
They route data based on IP addresses
What do wireless access points do?
connect you to wired networks
What does broadband mean?
capable of transmitting a wide range of frequencies
What do cable and DSL modems connect you to?
broadband networks
What do repeaters do?
Boost network signal
What do media converters do?
They convert between different media, such as ethernet (copper) and fiber optics
What OSI Layer device is an access point?
Layer 2
What is the standard used for broadband over coaxial cable?
DOCSIS (Data Over Cable Service Interface Specification)
What does the A in ADSL stand for and what does it mean?
Asymmetric
It means that download and upload speeds are not the same
How do you manage and configure all the wireless access points in an enterprise environment?
with a Wireless LAN Controller (WLC)
What is a Layer 3 capable switch?
a switch with routing capabilities
What are the two main features of load balancers?
Distribute load between servers and provide fault tolerance
What else do load balancers do?
offloads TCP protocol overhead
offloads encryption & decryption overhead
caching
prioritization
What utility do proxies have?
Content filtering and management of application traffic
If not a stand-alone device, where else can VPN Concentrators be found?
firewalls and server software
What’s the technical term for the “phone switch”?
Private Branch Exchange (PBX) and VoIP PBX
What does the Voice Gateway do?
Converts between VoIP and traditional phone lines (PSTN)
What was in use before VoIP?
POTS
Plain Old Telephone Service
What are 3 things that traditional firewalls filter?
IP- Source and Destination
Port number
Protocol
What OSI layers do traditional firewalls operate at?
3 and 4
What additional OSI layer do NGFWs operate at?
7
DPI (for NGFWs)
Deep Packet Inspection
What are 4 security functionalities NGFWs provide?
DPI, IDS/IPS, Malware detection, Real-Time Threat intelligence
What’s a good method of connecting IoT devices to a network?
by creating a separate subnet/segment for IoT devices
What is a VPN Headend, and what are its functions?
It’s where a VPN tunnel comes to an end/terminates. It authenticates, encrypts, decrypts, and routes.
