3 Flashcards
Explain GRE
Generic Routing Encapsulation is the static routing of the tunnel between the nodes
True or False
Type1: Bare Metal
Type2: Hosted
Type 2 is considered superior to type 1 from a performance and scalability standpoint.
False.
What transmission technique does PON use?
Wavelength Division Multiplexing
Explain SDWAN
Software Defined WAN is implementing cloud architectures which combine network and applications services into a centralised platform of a cloud. This adopts a virtual WAN architecture via MPLS, 5G, LTE and Broadband
Explain MPLS
Multipoint Labeling Switching is used by telco networks which uses short label paths to identify shorter virtual links
Explain mGRE
Multipoint Generic Routing Encapsulation is a tunnel that dynamically establishes to explicitly configure mapping entries
What is the hypervisor role in Virtual Networking?
Hypervisor is a program that allows it to manager multiple virtual networks
What are the 3 channels for ADSL
- Telephone POTS and analog traffic
- Upload channel
- Download channel
Explain Virtual Routers
Virtual routers are software only. They contain information about the systems connected to it. They have a routing table which can be statically or dynamically configured themselves
Name 3 different wireless toplogies
Infrastructure
Ad Hoc
Mesh
What are the 2 different types of broadband internet satellite services?
- One Way satellite
- Two Way satellite
Both require a satellite card and dish
Explain SAN
Storage Area Network which utilises clustered storage to enhance performance. They offer block-level data storage
Explain DSL
Digital Subscriber Line is internet access through the phone lines. DSL uses a different frequency for digital and analog signals meaning you can talk on the phone while uploading data
What is PSTN
Public Switched Telephone Networks also known as POTS is the phone system that is all connected. This is known as dial-up
What is PON?
Passive Optical Network is an unpowered optical splitters used to split the fiber to reach several locations.
Explain Virtual Switch
Vswitch is a software that allows Virtual machines to communicate with each other. Switch allows the VM to use the host OS NIC hardware
Name 2 type of Virtual Networks and their differences
Type 1 Bare Metal
Independent OS and boots beforehand
Type 2 Hosted
Dependent on OS and boots after OS and requires to function
What is OSI?
Open Source Interconnection
Advantages of SDWAN (4)
- Improves operational cost
- Scalability
- Increase performance
- Services on Demand
What is MDI-X Port and what cable to connect the modem
Medium-dependent interface crossed and uses a straight through unshielded twisted pair
What are the data formats for the Presentation Layer (3)?
- Graphic Files
- Text Files
- Sound/Video
Difference between Connectionless and Connection-Oriented Protocols (2)
- Connection oriented requires high overhead and greater bandwidth
- Connectionless is lower in bandwidth
What is ICMP most common Function
Ping or Echo
What happens when ping or echo function falls
A return message of Destination unreachable or time exceeded
What does Encapsulating Security Payload do
ESP provides encryption services
What are 4 functions of a Smart Jack
- Loopback
- Signal Amplification
- Surge protection
- Remote alarms
List the following OSI layers for the device:
1. Hub
2. Wireless Bridge
3. Switch
4. Router
5. NIC
6. AP
- Physical
- Physical
- Data Link or Network
- Network
- Data Link
- Data Link
What does the Session Layer do?
The session layer manages and controls data synchronisation between applications on two devices.
What are the sub-layers in the Data Link Layer?
MAC (Addresses in the NIC)
Logical Link Control LLC (Handles error and flow control)
Name the layers of TCP/IP
Application, Transport, Internet and Network layer
True or False
Does IP perform fragmentation
True
