Download CompTIA Network+ Exam Q&A: Network Protocols and Technologies and more Exercises Computer Networks in PDF only on Docsity!
COMPTIA NETWORK - EXAM QUESTIONS AND
VERIFIED ANSWERS 2025 /2026 EDITION
(GRADED A+) DETAILED ANSWERS!!
Prevents Data loops between switches at Layer 2 of OSI - ✅✅STP (Spanning Tree Protocol) WAN technology supporting 1.544 Mbps - ✅✅T1 line DNS Record type for IPv6 address resolution - ✅✅AAAA Type of LC Connector - ✅✅Small Form Factor of SC connector Tool to locate a break in coaxial cable quickly - ✅✅Time Domain Reflectometer (TDR) OSI layer for VLANs - ✅✅Layer 2 Mitigation for Smurf Attack - ✅✅Block ICMP requests Captured performance statistics for comparison and analysis - ✅✅Baseline Analysis Record organizational assets, including personnel - ✅✅Asset Management Topology where all devices are directly connected through a common cable - ✅✅BUS Layer 3 device for connecting subnets - ✅✅Router
Diagram detailing IP Addresses, Static vs Dynamic, Physical Locations, Cabling type, protocol, and speed of connections - ✅✅Physical Network Diagram Exchange routing information with autonomous networks - ✅✅Interior Gateway Protocol (IGP) Technology that breaks data into packets for transmission and assigns labels for routing - ✅✅MPLS Multiplexing protocol for transmitting data over optical cabling - ✅✅SDH Wireless broadband standard using multiple antennas for faster data rates - ✅✅HSPA+ (Evolved High Speed Packet Access) Different wavelengths carry signals over optical cabling - ✅✅DWDM (Dense Wave Division Multiplexing) Centrally stores data and is accessed using Remote Desktop - ✅✅Virtual Desktop DHCP Option 6: IP Addresses of DNS Servers for DHCP clients - ✅✅ DHCP Option 1 - ✅✅Subnet Mask DHCP Option 3 - ✅✅IP addresses of routers DHCP Option 15 - ✅✅DNS Domain Name used in names resolution Translates private and public IP addresses - ✅✅NAT Server
Bandwidth Shaper - ✅✅Prioritizes Traffic, controls transmission rates by port usage or protocol. Can delay packets to control bandwidth (Throttling). Load Balancer - ✅✅A network device that helps evenly distribute the flow of network traffic to other hosts. Multi Layer Switch - ✅✅A Layer 3 switch that provides routing. In Local Area Network (LAN), not on perimeter. Punch Down Tool - ✅✅Tool used to connect twisted pair cable to a 110 block. RIPv2 - ✅✅Distance vector routing protocol supported by the widest variety of routers between networks using a variable length subnet. Supports CIDR. Uses fewest hops (15 max). ARP (Address Resolution Protocol) - ✅✅Used to find the MAC (Media Access Control) address when IP address is known. DNS (Domain Name System) - ✅✅Host Name to IP address resolution. Port 53. Dynamic DNS allows DNS clients to update their resource records with the DNS server automatically when their IP address changes. - ✅✅DDNS (Dynamic DNS) Spanning Tree Protocol facilitates redundant links between segments connected with a layer 2 switch. - ✅✅STP (Spanning Tree Protocol) Baseline includes documentation showing bandwidth necessary for minimum performance targets, basic design specifications, and policy documentation. - ✅✅Baseline
Logical Network Diagram includes documentation showing logical network design, domain specifications, relationships, and server roles. - ✅✅Logical Network Diagram Physical Network Diagram includes documentation showing physical locations of equipment, infrastructure, and cable types and lengths. - ✅✅Physical Network Diagram Configuration Documentation includes documentation showing how devices and software are configured. - ✅✅Configuration Documentation SNMPv3 is a TCP/IP protocol that allows you to securely monitor network attached devices and provides information about network devices and controls network devices on port 161. - ✅✅SNMPv IMAP (Internet Message Access Protocol) is the email protocol used to communicate with an email server on port 143. - ✅✅IMAP (Internet Message Access Protocol) ICMP (Internet Control Message Protocol) is the protocol used for sending error and control messages (i.e. Ping messages). - ✅✅ICMP (Internet Control Message Protocol) Switch or Bridge loops occur when traffic gets routed between switches or bridges without reaching the destination. - ✅✅Switch or Bridge loops Link-State Routing Protocol - ✅✅OSPF (Open Shortest Path First)
- Uses route with lowest cost
- Considers Bandwidth and distance Convergence - ✅✅Network is in a steady state and All routers contain correct route information
Fastest Ethernet standard that can run on Category 3 (CAT3) cable - ✅✅10BASE-T Ethernet standard that requires Category 6 (CAT6) cable and operates at 10 Gigabits per second
- ✅✅10GBASE-T Port for Hypertext Transfer Protocol Secure (HTTPS) for secure communications - ✅✅Port 443 Port for Hypertext Transfer Protocol (HTTP) for unsecured traffic - ✅✅Port 80 At which OSI layer do Virtual Local Area Networks (VLANs) operate? - ✅✅Layer 2 Device that can prioritize traffic based on Quality of Service (QoS) - ✅✅Multilayer Switch Wide Area Network (WAN) technology that supports 44.736 Megabits per second with 672 channels - ✅✅T3 line Fiber optic line that uses Synchronous Optical Networking (SONET) with a speed of 51. Megabits per second - ✅✅OC-1 (Optical Carrier 1) ISDN-PRI - ✅✅WAN technology supporting 1.544 Mbps, 23 Channels, 64 Kbps per channel ISDN-BRI - ✅✅WAN technology supporting 128 Kbps, 2 Channels, 64 Kbps per channel Port 53 - ✅✅Port for DNS Server to resolve Host to IP addresses
UDP port 67 - ✅✅Port used for DHCP to assign IP addresses and BOOTP for diskless workstations TCP port 137 - ✅✅Port used for NetBIOS name resolution Proxy Server Function - ✅✅Protecting Clients Server Virtualization Limitation - ✅✅All instances had to be on the same subnet Content Switch - ✅✅Network device allowing server maintenance without service disruption MX Record - ✅✅DNS Record type for email server PTR Record - ✅✅Used for reverse DNS lookup, points to a CNAME record Reverse DNS Lookup - ✅✅Finding domain name from an IP address Alias Record for multiple DNS entries to point to the same IP address - ✅✅CNAME (Canonical Name) Mapping host name to an IPv4 address - ✅✅A Record (Address Record) Block for terminating high-speed networks - ✅✅110 Block Block for terminating telephone connections and networks up to 10 Mbps with CAT3 cabling - ✅✅66 Block
Intermediate Distribution Frames (IDFs) - ✅✅Common locations where cables from nearby offices terminate. Usually 110 or 66 blocks. Bayonet Connector - ✅✅Due to the long tip extending from the connector, a straight tip (ST) connector is also known as... Commonly used with MMF. MTRJ - ✅✅Fiber connection used to connect 2 fiber strands (one transmit, one receive) in a single connector. Service using VoIP to eliminate telephone switches. - ✅✅Virtual PBX Service replacing in-house voice switches. - ✅✅Hosted PBX Computing environment where the mainframe computer performs data storage and processing tasks for clients and network devices. - ✅✅Host Physical subdivision of a network linking devices or serving as a connection between 2 nodes. - ✅✅Segment Topology where a MUX separates signals to enable sharing media. - ✅✅Logical Star Network where CSMA/CA is commonly implemented. - ✅✅Ethernet Wireless transmission over multiple frequencies. - ✅✅Spread Spectrum Result of connecting a segment to multiple grounds. - ✅✅Introduction of Noise Controls data sent between 2 nodes. - ✅✅Ethernet Frames
Management frame to start and maintain wireless communications. 802.11 50 bytes long. - ✅✅Beacon Frames How many layers are in the TCP/IP network model? - ✅✅4 layers What service is added to the IP protocol to report the condition of a connection between 2 nodes? - ✅✅ICMP What is software that connects an application with a network protocol, using a port number, source and destination IP address? - ✅✅Socket What name resolution service translates FQDNs into IP addresses? - ✅✅DNS What provides information about latency and packet loss on a network? - ✅✅Ping What protocol allows a user to access a directory structure on a remote host, search and rename files, and download and upload files? - ✅✅FTP What type of switching network involves dividing data into variable-length packets? - ✅✅Packet switching network What is the role of an AS router that remains outside the AS? - ✅✅External router What routing type performs route discovery to build and update routing tables? - ✅✅Dynamic Routing When all subnets are configured in a VLAN, how many hops are allowed between local routes and the subnets? - ✅✅2 hops
Unix Command for IP Configuration Lookup of a Local Computer - ✅✅IFconfig VTP Minimizes Administrative Effort by Allowing VLAN Configuration on One Server - ✅✅VTP (VLAN Trunk Protocol) Back Out Plan: Processes to Restore a System to Original State - ✅✅Detailed Steps for Uninstalling or Reversing Changes What is often Overlooked in Business Continuity Planning? - ✅✅Single Points of Failure Fault Tolerance through Disk Mirroring - ✅✅Raid- 1 Ensuring Availability After a Hard Drive Failure in a Server - ✅✅Hardware RAID1 RAID 5 Removing a Server as a Single Point of Failure - ✅✅Failover Clustering What is the purpose of a UPS? - ✅✅Provides fault tolerance How can an organization ensure availability during a power outage? - ✅✅By using generators What is the fastest way to recover data? - ✅✅Performing a full daily backup Where should backups be stored for safety? - ✅✅Off-site locations How can the restore capability of a full backup be verified? - ✅✅By conducting a test restore
What does BIA identify in terms of recovery? - ✅✅Identifies RPOs and RTOs What does BIA determine for a Business Continuity Plan? - ✅✅Identifies business requirements What type of site supports a Recovery Time Objective (RTO) of 1 hour? - ✅✅Hot site Which is the most expensive Continuity of Operations Site? - ✅✅Hot site What type of site balances cost and recovery time? - ✅✅Warm site What is needed for a Cold Site? - ✅✅Power and Connectivity What is the Last Step in the Disaster Recovery Process? - ✅✅Review How to Verify System Functionality after a Disaster Recovery? - ✅✅Compare system performance against the baseline performance. What is implemented to restore a failed system? - ✅✅Disaster Recovery Plan (DRP) How to Validate a Business Continuity Plan (BCP)? - ✅✅Testing What should be implemented with a Fire Alarm System to prevent fire spread? - ✅✅HVAC (Heating, Ventilation, and Air Conditioning) What is the Purpose of Hot/Cold Aisles? - ✅✅Regulate cooling, Increase availability, Reduce cooling costs
