D315/C172 Section 1 Practice Quiz

At which OSI layer does the MAC (Media Access Control) address operate?

Layer 2 - Data Link

At which OSI layer do port numbers operate?

Layer 4 - Transport

Hybrid cloud deployment model (IT asset location)

IT assets are distributed between on-premises infrastructure and cloud services

Cloud deployment model that uses services from multiple cloud providers

Multi-cloud

Network topology in which all nodes connect to a central device

Star

Deployment most likely to use dedicated hardware for cloud services

Private Cloud

Linux command to query a DNS server to resolve a hostname or domain name to an IP address

Dig

Network topology with multiple pathways between any two devices, providing redundancy if a link fails

Mesh

Primary function of a router

To connect multiple networks and route data packets between them

Hypervisor type that installs as an application on top of an existing operating system

Type 2

Network topology that interconnects multiple other topologies

Hybrid

OSI layers in order from Layer 1 to Layer 7

1 Physical, 2 Data Link, 3 Network, 4 Transport, 5 Session, 6 Presentation, 7 Application

Role of client devices in client/server architecture

They request and consume services provided by the server.

Cloud service model best for developing and testing software without managing underlying infrastructure

PaaS

Windows network command that displays the path a packet takes from source to destination

tracert

Type 1 hypervisor

Virtualization software that runs directly on the host's hardware to control the hardware and to manage VM guest operating systems

Linux command to display the IP address of the computer being used

ifconfig

Command to query a DNS server to resolve a hostname or domain name to an IP address

nslookup

Device commonly used to provide wireless connectivity to devices in a LAN

Wireless Access Point (WAP)

Configuration in a Peer-to-Peer architecture

Decentralized configuration, where the configuration must be done on all devices individually

Networking device that repeats and sends a signal out of all ports without inspecting network addressing

Hub

Network type used to connect multiple buildings within a short distance

(campus-scale network: CAN)

Network type for short-distance device communication, such as wireless earbuds connecting to a phone

PAN (Personal Area Network)

Windows command that displays the IP address to MAC address mapping

arp -a

Community cloud model

It is shared by several organizations with common goals or concerns

Windows command to get the IP address of the computer being used

ipconfig

At which OSI layer does a router operate?

Layer 3 - Network

Network type typically used to connect devices within a single building

LAN (Local Area Network)

Public cloud model

It offers computing services over the public internet and is available to anyone who wants to purchase them

Layer count comparison between OSI and TCP/IP models

OSI has 7 layers, while TCP/IP has 4 layers.

Windows command to see whether a TCP connection is active

netstat

Key benefit of SaaS

Elimination of the need for application installations and updates on individual computers

Function of the Presentation layer of the OSI model

Data encryption, decryption, and formatting

At which OSI layer does an IP address operate?

Layer 3 - Network

At which OSI layer does a switch operate?

Layer 2 - Data Link

Transport layer protocol that provides guaranteed, reliable delivery of data

TCP

Command to check whether a computer is connected to the network and can respond

ping

What IaaS provides to the consumer

Physical computing resources, virtualized and delivered over the internet

OSI layer that establishes, manages, and terminates connections with a remote device

Layer 5 - Session

Wireless network topology with a central wireless device such as a wireless router or access point

Infrastructure

Network used to connect computer networks and LANs over vast geographical distances

WAN (Wide Area Network)

Device commonly used to connect to an ISP to facilitate Internet access

Modem

Linux network command that displays the path a packet takes from source to destination

traceroute

Hypervisor type most likely used to deploy a production VM providing a critical network service to hundreds of users

Type 1

Purpose of a firewall in a network

To filter incoming and outgoing traffic based on a set of rules

Network topology where data packets travel around a closed loop until reaching the destination

Ring

Configuration in client/server architecture

Centralized configuration, where the configuration is done on a central server and pushed to all other devices

Network type used to connect networks over the scope of a city

MAN (Metropolitan Area Network)

Resource sharing roles in P2P compared with client/server networks

In P2P, devices can both request and provide resources, while in client/server, roles are more rigidly defined.

OSI layers combined into the Application layer of the TCP/IP model

Layers 5 (Session), 6 (Presentation), and 7 (Application)