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CompTIA A+ cert 1 > 2.1.2 Common Network Ports > Flashcards

2.1.2 Common Network Ports Flashcards

1
Q

What is FTP? What is it used for? What are its port #s for both active mode data and control?

A
  • File Transfer Protocol
  • Transfers files between systems
  • tcp/20 for active mode data
  • tcp/21 for control
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2
Q

What is SSH? What is it used for? What is it’s port #?

A
  • Secure Shell
  • Used for encrypted communication between systems over a network
  • tcp/22
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3
Q

What is Telnet? What is it used for? What is its port #?

A
  • Telecommunication Network
  • Used to log into devices remotely
  • tcp/23
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4
Q

What is SMTP? What is it used for? What is its port #?

A
  • Simple Mail Transfer Protocol
  • server-to-server email transfer
  • tcp/25
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5
Q

What is DNS? What is it used for? What is its port #?

A
  • Domain Name System
  • converts url names into IP addresses
  • udp/53
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6
Q

What is HTTP? What is it used for? What are both its unsecure and secure port #s?

A
  • Hypertext Transfer Protocol
  • Communication between web servers in browser and by other applications
  • unsecure (http): tcp/80
  • secure (https): tcp/443
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7
Q

What is the POP3 port #?

A

tcp/110

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8
Q

What is the IMAP4 port #?

A

tcp/143

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9
Q

What is RPD? What is it used for? What is it’s port #?

A
  • Remote Desktop Protocol
  • allows access to remote desktops over a network
  • tcp/3389
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10
Q

What is SMB? What is it used for? What is another name for it? What is it’s direct port #?

A
  • Server Message Block
  • file and printer sharing protocol used exclusively by Windows
  • also called CIFS (Common Internet File System)
  • tcp/445
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11
Q

What is NetBIOS? What is it used for? What are it’s name services, datagram service and session service port #s

A
  • Network Basic Input/Output System
  • used by SMB to communicate across local network
  • name services port: udp/137 (nbname)
  • datagram services port: udp/138 (nbdatagram)
  • session services: tcp/139 (nbsession)
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12
Q

What is AFP? What is it used for? What is it’s port #?

A
  • Apple Filing Protocol
  • Apple Protocol for transferring files, plus viewing, renaming and deleting them
  • tcp/548
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13
Q

What is SLP? What other protocol does it work in conjunction with? What is it used for? What are its two port #s?

A
  • Service Location Protocol
  • works with AFP to transfer files
  • populates a list of available servers for a file / files
  • tcp/427 and udp/427
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14
Q

What is DHCP? What is it used for? What are its port #s?

A
  • Dynamic Host Configuration Protocol
  • automatically configures IP address, subnet mask and other options for a device
  • udp/67 and udp/68
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15
Q

What is LDAP? What is it used for? What are its port #s?

A
  • Lightweight Directory Access Protocol
  • connects device to a corporate network, VPN or web server
  • tcp/389
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16
Q

What is SNMP? What is it used for? What are its port #s both for queries and traps?

A
  • Simple Network Management Protocol
  • Gathers statistics from network devices
  • queries: udp/161
  • traps: udp/162
17
Q

How are SSH and Telnet similar to each other? How are they different?

A

Both allow a user to remotely access and manage a device ; Telnet transfers data in plain text while SSH transfers data in an encrypted format.

18
Q

What is “in-the-clear” communication?

A

anyone receiving data packets on the network can see and view that communication

19
Q

What protocol is relied upon for most of the internet’s connectivity?

A

DNS

20
Q

What are the advantages of IMAP4 over POP3?

A

IMAP4 allows for multiple folders of mail, and allows management of mail from multiple devices.

21
Q

Which OS has built-in RPD services?

A

Microsoft

22
Q

What OS does not use FTP?

A

Microsoft

23
Q

What does it mean when IP addresses are dynamic / pooled?

A

IP addresses are assigned in real time from a pool, and each system is given a lease that must be renewed periodically.

24
Q

What happens when an IP address is given a reservation?

A

DHCP server will recognize the MAC address and provides the same one every time.

25
Q

What is LDAP used to connect the client to? What other functionality does it have?

A
  • A centralized database

- Used to store and retrieve information in a network directory

26
Q

What are advantages of SNMP v2 over v1?

A

V2 provides:

  • data type enhancements
  • bulk transfers
27
Q

What is the difference between queries and traps in SNMP?

A

queries poll information about all devices on network, while traps are alarms that are sent over the trap port based on real-time events

CompTIA A+ cert 1 (12 decks)

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