Networking Concepts Quiz
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Questions and Answers

Which layer in the TCP model has TCP as its main protocol?

  • Network
  • Application
  • Transport (correct)
  • Data Link

    • What is the first step in troubleshooting a network-related problem in a small to medium-sized business?

    Identify the problem

    Ping is used to see if one can connect to a destination's IP address.

    True

    Traceroute shows actual IP addresses on a path from a source to a destination.

    <p>False</p> Signup and view all the answers

    The host command performs DNS lookups.

    <p>True</p> Signup and view all the answers

    Netstat shows open and listening ports on a device.

    <p>True</p> Signup and view all the answers

    Which type of network cables can carry signals over the longest distances?

    <p>Single-mode fiber</p> Signup and view all the answers

    A layer 2 switch is also called a bridge.

    <p>True</p> Signup and view all the answers

    A layer 2 switch uses routing tables.

    <p>False</p> Signup and view all the answers

    A switch floods ports if it does not know where to send a packet.

    <p>True</p> Signup and view all the answers

    A Firewall can be a hardware device.

    <p>True</p> Signup and view all the answers

    A Firewall can be a software package.

    <p>True</p> Signup and view all the answers

    A Firewall is a special room to protect servers.

    <p>False</p> Signup and view all the answers

    A secondary name server gets its data from another name server using a zone transfer.

    <p>True</p> Signup and view all the answers

    AAAA records resolve hostnames to IPv4 addresses.

    <p>False</p> Signup and view all the answers

    Entries in a HOSTS file on a local computer take precedence over DNS.

    <p>True</p> Signup and view all the answers

    A user in your company cannot connect to any of the servers which are on the 192.168.1.0 network. The problem is?

    <p>There is no default gateway</p> Signup and view all the answers

    What is the solution for a user unable to connect to servers on the 192.168.1.0 network?

    <p>Configure a default gateway in the 10.1.3.x network</p> Signup and view all the answers

    Which are tunnels used to transmit IPv6 address information over IPv4? (Choose two)

    <p>Teredo</p> Signup and view all the answers

    What should you do to group all of the Administrative Assistants' computers to communicate as if they were on the same network?

    <p>Configure a VLAN</p> Signup and view all the answers

    Which command-line tool is used to display IP address information and DHCP server information?

    <p>Ipconfig/all</p> Signup and view all the answers

    How can you connect computer devices using a public network and ensure their messages are safe from being intercepted by unauthorized users?

    <p>VPN</p> Signup and view all the answers

    Which one of the following is a second-level domain?

    <p>In-addr.arpa</p> Signup and view all the answers

    What is the main method used by firewalls to filter traffic? (Choose two)

    <p>Protocols</p> Signup and view all the answers

    A router is a device that functions primarily on the Data Link layer of the OSI Model.

    <p>False</p> Signup and view all the answers

    What type of connection allows for sending and receiving data simultaneously?

    <p>Full duplex</p> Signup and view all the answers

    What type of VPN should you set up between two companies collaborating on a project?

    <p>Site to site</p> Signup and view all the answers

    Match the following networking functions with their definitions:

    <p>Allows or blocks data packets = Firewall Authenticates a user from an external network = Remote Access Server Distributes IP addresses = DHCP Makes a request from a private IP address routable = NAT Uses a public network for private data communications = VPN</p> Signup and view all the answers

    Match the following connection types with their descriptions:

    <p>Uses connections over shared broadband = Cable modems Uses dedicated phone lines to connect to telco provider offices = DSL Uses two 64Kbps channels = ISDN</p> Signup and view all the answers

    A router is used to separate multiple networks.

    <p>True</p> Signup and view all the answers

    A VLAN is typically configured on a router.

    <p>False</p> Signup and view all the answers

    NAT is the mapping of a private LAN IP address to a public IP address.

    <p>True</p> Signup and view all the answers

    Public websites are accessed through port 25.

    <p>False</p> Signup and view all the answers

    Secured websites are accessed through port 443 by default.

    <p>True</p> Signup and view all the answers

    Unsecured websites are accessed through port 80 by default.

    <p>True</p> Signup and view all the answers

    An example of a physical ring topology would be what?

    <p>Eight hubs connected to a single switch</p> Signup and view all the answers

    The cable in the box is a _____ cable.

    <p>Crossover</p> Signup and view all the answers

    In which type of connection would a crossover cable be used?

    <p>Switch and switch</p> Signup and view all the answers

    What is indicated by the portion of the diagram labeled 'A'?

    <p>Internet</p> Signup and view all the answers

    What is indicated by the portion of the diagram labeled 'B'?

    <p>Intranet</p> Signup and view all the answers

    What is indicated by the portion of the diagram labeled 'C'?

    <p>Extranet</p> Signup and view all the answers

    A mesh network has to have termination points at both ends of the network.

    <p>False</p> Signup and view all the answers

    What is the physical topology of the mentioned network?

    <p>Mesh</p> Signup and view all the answers

    How many connections are there among the routers?

    <p>6</p> Signup and view all the answers

    Which two types of servers are typically placed in a perimeter network?

    <p>Email server</p> Signup and view all the answers

    What must be changed to receive an IP address from the DHCP service on the router?

    <p>Enable obtain an IP address automatically</p> Signup and view all the answers

    How should the DNS address be obtained after setting DHCP?

    <p>Automatically, through the DHCP server</p> Signup and view all the answers

    Match the following ping commands with their descriptions:

    <p>Assigns a specific number of packets to transmit = Ping -n Continuously pings a remote host until stopped = Ping -t Sends four packets to the local loopback address = Ping 127.0.0.1 Specifies the size of the packet to transmit = Ping -l</p> Signup and view all the answers

    Match the following cable types with their speed capacities:

    <p>1 GBps = Cat5e 10 Mbps = Cat3 100 Mbps = Cat5</p> Signup and view all the answers

    Which two options are valid IP addresses you could assign to a computer on the same network as a router configured with an interface of 192.168.1.100?

    <p>192.168.1.254</p> Signup and view all the answers

    What does 'WAN' refer to in networking?

    <p>DSL</p> Signup and view all the answers

    In which directions can communication occur between layers of the OSI model? (Choose three)

    <p>To peer layer in other networked computer systems</p> Signup and view all the answers

    Which three layers on the OSI model make up the Application layer on the TCP model? (Choose three)

    <p>Application</p> Signup and view all the answers

    What is the physical topology of this network?

    <p>Star</p> Signup and view all the answers

    What is indicated by the ranges 192.168.0.0 - 192.168.255.255?

    <p>Private network addresses</p> Signup and view all the answers

    What is indicated by the ranges 224.0.0.0 - 239.255.255.255?

    <p>Multicast addresses</p> Signup and view all the answers

    What is indicated by the ranges 75.0.0.0 - 75.255.255.255?

    <p>Public network addresses</p> Signup and view all the answers

    You should use a _____ cable to connect each computer to the hub.

    <p>Straight-through</p> Signup and view all the answers

    You should use a _____ cable to connect each hub to the switch.

    <p>Crossover</p> Signup and view all the answers

    What is the primary disadvantage of a bus topology?

    <p>The network has a single point of failure</p> Signup and view all the answers

    Which IP address in a routing table signifies a default route?

    <p>0.0.0.0</p> Signup and view all the answers

    Which is a characteristic of peer to peer networks?

    <p>Usually connects 10 or fewer devices</p> Signup and view all the answers

    What best describes a virtual machine?

    <p>Multiple operating systems running on one physical computer</p> Signup and view all the answers

    Which tool should you use to test if your Ethernet cables are wired correctly?

    <p>Cable tester</p> Signup and view all the answers

    Which type of wireless network does not have a centralized device, such as a wireless access point or wireless router?

    <p>Ad hoc</p> Signup and view all the answers

    Which role needs to be added to an on-premises Windows Server in order to enable routing through the server?

    <p>Remote Access</p> Signup and view all the answers

    What is the local address in IPv6?

    <p>::1</p> Signup and view all the answers

    Study Notes

    Transport Layer

    • TCP is the main protocol in the Transport layer of the TCP model.

    Troubleshooting Steps

    • The initial step in diagnosing network problems in small to medium-sized businesses is identifying the issue.

    Network Commands

    • Ping tests connectivity to a destination IP address.
    • Traceroute displays IP addresses along the path from source to destination.
    • The host command performs DNS lookups.
    • Netstat reveals open and listening ports on a device.

    Network Cabling

    • Single-mode fiber cables can carry signals over the longest distances.

    Layer 2 Switches

    • A layer 2 switch is also known as a bridge.
    • Layer 2 switches do not use routing tables and flood ports when the destination is unknown.

    Firewalls

    • Firewalls can be either hardware devices or software packages, but they are not physical rooms for server protection.

    DNS and HOSTS File

    • A secondary name server obtains data from another server via zone transfer.
    • AAAA records resolve hostnames to IPv6 addresses.
    • Entries in a HOSTS file take precedence over DNS entries.

    Network Connectivity Issue

    • A common issue for users unable to connect to a specific network is the absence of a default gateway; configuring a default gateway in the appropriate network can resolve this.

    IPv6 Tunneling

    • ISATAP and Teredo are tunneling protocols for transmitting IPv6 information over IPv4.

    VLAN Configuration

    • To enable communication among a group of computers located in different areas, configure a Virtual Local Area Network (VLAN).

    IP Addressing Tools

    • The command ipconfig /all displays detailed IP and DHCP server information.

    Secure Communications

    • Virtual Private Networks (VPNs) are used to secure messages over public networks from unauthorized access.

    Domain Names

    • An example of a second-level domain is "in-addr.arpa".

    Traffic Filtering by Firewalls

    • Firewalls primarily filter traffic based on ports and protocols.

    Router Functionality

    • Routers operate primarily at the Network layer, not the Data Link layer.

    Connection Types

    • Full duplex connections allow simultaneous sending and receiving of data.

    VPN Types

    • Site-to-site VPNs are used to connect two networks for collaboration.

    Network Component Functions

    • Firewalls control data packet access, Remote Access Servers authenticate users, DHCP distributes IP addresses, NAT manages private IP routing, and VPNs facilitate secure communications over public networks.

    Internet Connection Types

    • Cable modems use shared broadband, DSL uses dedicated lines, and ISDN employs two 64Kbps channels.

    Router and NAT Functions

    • A router separates multiple networks; NAT translates private IP addresses to public ones; VLAN configurations typically occur on switches, not routers.

    Common Ports

    • Port 25 is used for email, while ports 80 and 443 are used for unsecured and secured web traffic respectively.

    Topology Considerations

    • Ring topology is often mistaken for star topology; the physical topology of a network can significantly affect performance and reliability.

    Networking Standards

    • A crossover cable is used to connect similar devices, like switch to switch, while straight-through cables connect dissimilar devices, like computers to switches.

    Network Address Ranges

    • Private network addresses range from 192.168.0.0 to 192.168.255.255, multicast addresses from 224.0.0.0 to 239.255.255.255, and public network addresses cover the remainder.

    Bus Topology Disadvantage

    • A major drawback of bus topology is its reliance on a single cable, representing a single point of failure.

    Default Routing

    • The default route in a routing table is indicated by the address 0.0.0.0.

    Peer-to-Peer Networks

    • Peer-to-peer networks typically connect 10 or fewer devices, allowing direct communication between users.

    Virtual Machines

    • Virtual machines enable multiple operating systems to run on a single physical computer, enhancing resource utilization.

    Cable Testing

    • A cable tester is essential for verifying the correct wiring of Ethernet cables.

    Wireless Networking

    • Ad hoc networks operate without centralized devices like routers or access points.

    Routing on Windows Servers

    • To enable routing on an on-premises Windows Server, the Remote Access role must be added.

    IPv6 Local Address

    • The local IPv6 address (::1) is the loopback address, analogous to 127.0.0.1 in IPv4.

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    Description

    Test your knowledge on core networking concepts, including the Transport layer, common network commands, and cabling types. This quiz covers everything from TCP to firewalls, ensuring you have a comprehensive understanding of network fundamentals.

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