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Which layer in the TCP model has TCP as its main protocol?
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.
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The host command performs DNS lookups.
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Netstat shows open and listening ports on a device.
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Which type of network cables can carry signals over the longest distances?
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A layer 2 switch is also called a bridge.
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A layer 2 switch uses routing tables.
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A switch floods ports if it does not know where to send a packet.
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A Firewall can be a hardware device.
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A Firewall can be a software package.
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A Firewall is a special room to protect servers.
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A secondary name server gets its data from another name server using a zone transfer.
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AAAA records resolve hostnames to IPv4 addresses.
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Entries in a HOSTS file on a local computer take precedence over DNS.
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A user in your company cannot connect to any of the servers which are on the 192.168.1.0 network. The problem is?
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What is the solution for a user unable to connect to servers on the 192.168.1.0 network?
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Which are tunnels used to transmit IPv6 address information over IPv4? (Choose two)
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What should you do to group all of the Administrative Assistants' computers to communicate as if they were on the same network?
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Which command-line tool is used to display IP address information and DHCP server information?
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How can you connect computer devices using a public network and ensure their messages are safe from being intercepted by unauthorized users?
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Which one of the following is a second-level domain?
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What is the main method used by firewalls to filter traffic? (Choose two)
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A router is a device that functions primarily on the Data Link layer of the OSI Model.
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What type of connection allows for sending and receiving data simultaneously?
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What type of VPN should you set up between two companies collaborating on a project?
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Match the following networking functions with their definitions:
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Match the following connection types with their descriptions:
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A router is used to separate multiple networks.
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A VLAN is typically configured on a router.
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NAT is the mapping of a private LAN IP address to a public IP address.
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Public websites are accessed through port 25.
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Secured websites are accessed through port 443 by default.
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Unsecured websites are accessed through port 80 by default.
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An example of a physical ring topology would be what?
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The cable in the box is a _____ cable.
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In which type of connection would a crossover cable be used?
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What is indicated by the portion of the diagram labeled 'A'?
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What is indicated by the portion of the diagram labeled 'B'?
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What is indicated by the portion of the diagram labeled 'C'?
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A mesh network has to have termination points at both ends of the network.
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What is the physical topology of the mentioned network?
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How many connections are there among the routers?
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Which two types of servers are typically placed in a perimeter network?
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What must be changed to receive an IP address from the DHCP service on the router?
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How should the DNS address be obtained after setting DHCP?
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Match the following ping commands with their descriptions:
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Match the following cable types with their speed capacities:
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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?
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What does 'WAN' refer to in networking?
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In which directions can communication occur between layers of the OSI model? (Choose three)
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Which three layers on the OSI model make up the Application layer on the TCP model? (Choose three)
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What is the physical topology of this network?
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What is indicated by the ranges 192.168.0.0 - 192.168.255.255?
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What is indicated by the ranges 224.0.0.0 - 239.255.255.255?
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What is indicated by the ranges 75.0.0.0 - 75.255.255.255?
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You should use a _____ cable to connect each computer to the hub.
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You should use a _____ cable to connect each hub to the switch.
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What is the primary disadvantage of a bus topology?
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Which IP address in a routing table signifies a default route?
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Which is a characteristic of peer to peer networks?
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What best describes a virtual machine?
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Which tool should you use to test if your Ethernet cables are wired correctly?
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Which type of wireless network does not have a centralized device, such as a wireless access point or wireless router?
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Which role needs to be added to an on-premises Windows Server in order to enable routing through the server?
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What is the local address in IPv6?
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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.