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Technology
Computer Hardware
Network+ N10-007
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FIND ESSAY
Network+ N10-007
Persephone Allen
10 September 2022
4.7
(114 reviews)
110 test answers
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(106)
question
Telnet
answer
tcp/23 - Unencrypted remote communication
question
SSH - Secure Shell
answer
tcp/22 - Encrypted communication link
question
DNS - Domain Name System
answer
udp/53 - Converts names to IP addresses
question
SMTP - Simple Mail Transfer Protocol
answer
tcp/25 - serv-to-serv email transfer / send email
question
SFTP - Secure FTP
answer
tcp/22 - SSH File Transfer Protocol
question
FTP - File Transfer Protocol
answer
tcp/20 (active mode data), tcp/21 (control) - transfer files between systems with authentication
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TFTP - Trivial FTP
answer
udp/69 - file transfer w/o authentication or encryption
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DHCP - Dynamic Host Configuration Protocol
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udp/67, udp/68 - Automated config of IP address, subnet mask and other options
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HTTP - Hypertext Transfer Protocol
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tcp/80 - communication in browser and other applications
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HTTPS - HTTP Secure
answer
tcp/443 - secure communication in browser
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SNMP - SImple Network Management Protocol
answer
udp/161 - gather data from network devices
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SNMP Trap
answer
tcp/162, udp/162 - notification sent from SNMP agent to SNMP manager
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RDP - Remote Desktop Protocol
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tcp/3389 - share desktop remotely
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NTP - Network Time Protocol
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udp/123 - Sync clocks between devices
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SIP - Session Initiation Protocol
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tcp/5060, tcp/5061 - Setup and manage VoIP sessions
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SMB - Server Message Block
answer
tcp/445 - file sharing/printer sharing Windows
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POP3 - Post Office Protocol version 3
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tcp/110 - basic mail transfer
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IMAP - Internet Message Access Protocol v4
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tcp/143 - Includes management of email inbox from multiple clients
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LDAP - Lightweight Directory Access Protocol
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tcp/389 - Store and retrieve info in a network directory
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LDAPS - LDAP Secure
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tcp/636 - non-standard LDAP over SSL
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H.323 - H.32x protocol
answer
tcp/1720 - VoIP setup and management
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MGCP - Media Gateway Control Protocol
answer
udp/2427, udp/2727 - Call control for VoIP
question
NetBIOS - Network Basic Input/Output System
answer
tcp/139, udp/137, udp/138 - Network communication servers for LANs that use NetBIOS
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NNTP - Network New Transport Protocol
answer
tcp/119 - posting and reading articles on Usenet news servers
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rsh - Remote Shell
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tcp/514 - execute commands on computer from remote user
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RTP - Real-time Transport Protocol
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tcp/5004,5005 udp/5004,5005 - Deliver media-based data
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RTSP - Real-time Streaming Protocol
answer
tcp/554, udp/554 - communicates w/ media server and controls playback of media files
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Layer 1 - Physical
answer
Signaling, cabling, connectors - bad cables, punch-downs, loopback, adapter cards
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Layer 2- Data Link Layer
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MAC addresses, switches, frame, EUI
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Layer 3 - Network Layer
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Routing, IP, fragments frames, packets
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Layer 4 - Transport Layer
answer
TCP/UPD
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Layer 5 - Session Layer
answer
Communication management, control protocols, tunneling protocols
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Layer 6 - Presentation Layer
answer
Character encoding, application encryption, often combined w/ application layer (SSL/TLS)
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Layer 7 - Application Layer
answer
layer we see, HTTP, FTP, DNS, POP3
question
CSMA/CD - Carrier Sense Multiple Access / Collision Detect
answer
Senses data across multiple devices on network to detect when two stations talk at once - Half-duplex Ethernet
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CSMA/CA - CSMA / Collision Avoidance
answer
Wireless (Ready To Send - Clear To Send)
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STP - Spanning Tree Protocol
answer
Prevent loops in switch
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10BASE5
answer
Coax (thicknet) - 10Mbps, 500 m
question
10BASE2
answer
Coax (thinnet) - 10Mbps, 185 m
question
10BASE-T
answer
Cat 3 UTP - 10Mbps, 100 m
question
100BASE-TX
answer
Cat 5 UTP - 100Mbps, 100 m
question
100BASE-FX
answer
MMF (multi-mode fiber) - 100Mbps, 2 km
question
1000BASE-T
answer
Cat 5e UTP - 1Gbps, 100 m
question
1000BASE-TX
answer
Cat 6 UTP - 1Gbps, 100 m
question
1000BASE-LX
answer
MMF - 1Gbps, 5 km
question
1000BASE-SX
answer
SMF (Single-mode fiber) - 1Gbps, 5 km
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1000BASE-LH
answer
SMF - 1Gbps, 10 km
question
1000BASE-ZX
answer
SMF - 1Gbps, 70 km
question
10GBASE-SR
answer
MMF - 10Gbps, 26m-400 m
question
10GBASE-LR
answer
SMF - 10Gbps, 10-25 km
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10GBASE-ER
answer
SMF - 10Gbps, 40 km
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10GBASE-SW
answer
MMF - 10Gbps, 300 m
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10GBASE-LW
answer
SMF - 10Gbps, 10 km
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10GBASE-EW
answer
SMF - 10Gbps, 40 km
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10GBASE-T
answer
Cat 6a or Cat 7 - 10Gbps, 100 m
question
100GBASE-SR10
answer
MMF - 100Gbps, 125 m
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100GBASE-LR4
answer
SMF - 100Gbps, 10 km
question
100GBASE-ER4
answer
SMF - 100Gbps, 40 km
question
ST connector
answer
Straight tip - Used w/ MMF (push in connector and twist)
question
SC
answer
Subscriber/Standard/Square Connector - push/pull
question
LC
answer
Lucent Connector - push/depress tab
question
MTRJ
answer
Media Termination Recommended Jack - 2 fiber strands in single connector - push/pull
question
RJ-45
answer
Ethernet - 8-pin connector
question
RJ-11
answer
Phone - 6-pin connector
question
DB-9 (RS-232)
answer
Serial - 9-ping connector
question
BNC
answer
Coaxial - with pin
question
F-connector
answer
Coaxial - tv connections
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RG-58
answer
Coax - 50 Ohms - short distance
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RG-6
answer
Coax - 75 Ohms - long distance
question
RG-59
answer
Coax - 75 Ohms - short distance
question
Class A - Public
answer
1-126 ... 255.0.0.0 (/8)
question
Class B - Public
answer
128-191 ... 255.255.0.0 (/16)
question
Class C - Public
answer
192-223 ... 255.255.255.0 (/24)
question
Class D - Public
answer
224-239 (destination IP addresses for multicast networks)
question
Class E - Public
answer
240-255 (experimental use IP addresses)
question
Class A - Private
answer
10.0.0.0-10.255.255.255 /8
question
Class B - Private
answer
172.16.0.0-172.31.255.255 /16
question
Class B - Private (APIPA)
answer
169.254.0.0-169.254.255.255 /16
question
Class C - Private
answer
192.168.0.0-192.168.255.255 /24
question
RIP
answer
Routing Information Protocol - route based on hop count
question
OSPF
answer
Open Shortest Path First - link-state route based on available bandwidth (cost)
question
EIGRP
answer
Exterior-Interior Gateway Routing Protocol - (Cisco proprietary) route based on bandwidth and delay w/ possible additional parameters
question
BGP
answer
Border Gateway Patrol - Exterior Gateway Protocol that routes based on number of autonomous system hops to reach destination
question
IS-IS
answer
Intermediate System-to-Intermediate System - link-state route based on Dijkstra's shortest path first algorithm (configurable, dimensionless metric)
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NAT
answer
Network Address Translation - allows private IP addresses to translate into publicly-routable IP addresses
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PAT
answer
Port Address Translation - assigns port to inside local address to route to port on global address
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DNAT/SNAT
answer
Dynamic NAT/Static NAT - auto assign/statically assign inside global address
question
IGMP
answer
Internet Group Management Protocol - defines which interfaces have multicast receivers attached
question
PIM
answer
Protocol Independent Multicast - routes multicast traffic between multicast-enabled routers
question
MPLS
answer
Multiprotocol Label Switching - WAN tech used by service providers (inserts 32-bit header between L2 and L3 headers)
question
CPE
answer
Customer Premises Equipment - device resides at customer site (connects w/ MPLS service provider)
question
CE
answer
Customer Edge - router that provides connectivity between network and server provider (don't run MPLS)
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ELSR
answer
Edge Label Switch Router - on edge of MPLS server providers' cloud and interconnects w/ one or more customers
question
PE
answer
Provider Edge - MPLS service provider's router that connects to customer router
question
LSR
answer
Label Switch Router - part of service provider's MPLS cloud and makes frame-forwarding decisions
question
P
answer
Provider - service provider internal router
question
ATM
answer
Asynchronous Transfer Mode - Layer 2 WAN tech uses fixed-length cells as its protocol data unit
question
Dedicated Leased Line
answer
WAN connection interconnecting two sites (T1, T3 circuits)
question
Circuit-switched connections
answer
WAN connection brought up on an as-needed basis (ISDN - Integrated Services Digital Network)
question
Packet-switched connection
answer
WAN connection allowing multile customers to share an SP's bandwidth (Frame Relay)
question
DSSS
answer
Direct-sequence spread spectrum - modulates data over entire range of frequencies w/ chips including random data
question
FHSS
answer
Frequency-hopping spread spectrum - allows participants in a communication to hop between predetermined frequencies
question
OFDM
answer
Orthogonal frequency-division multiplexing - slow modulation rate w/ simultaneous transmission of data over 52 data streams
question
802.11
answer
2.4GHz / 1 or 2Mbps / DSSS or FHSS / 20 m indoors or 100 m outdoors
question
802.11a
answer
5 GHz / 54Mbps / OFDM / 35 m in or 120 m out
question
802.11b
answer
2.4GHz / 11Mbps / DSSS / 32 m in or 140 m out
question
802.11g
answer
2.4GHz / 54 Mbps / OFDM or DSSS / 32 m in or 140 m out
question
802.11n
answer
2.4 or 5 GHz (or both) / > 300Mbps / OFDM / 70 m in or 250 m out
question
802.11ac
answer
5GHz / > 3Gbps / OFDM / 70 m in or 250 m out
question
Bit-Error Rate Tester
answer
Equipment used to test interference on a transmission medium, faulty cabling, that can cause errors in transmission of bits
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