CH8 - Course Quiz Flashcards
At any given point, your computer can only be connected to one server at a time?
True
False
False
Every serving application has a Listening Port?
True
False
True
Which TCP port does the old active File Transfer Protocol (FTP) use by default?
20 and 21
80 and 81
25 and 110
22 and 23
20 and 21
Which switch is used with the Windows netstat utility to show the Process ID?
- p
- b
- n
- o
-o
What TCP/IP application uses Port 80?
Web Server
Telnet
FTP
HTTPS
Web Server
Which Protocol enables you to administer a server remotely and communicate with other Servers on your Network?
Telnet
SMTP
HTTPS
FTP
Telnet
A Web Client’s source port number, generated pseudo-randomly by the Web Client computer, is classically assigned as a _________ ports?
logical
dynamic
listening
well-known
dynamic
Which Protocol is the preferred altnernative to POP3 and runs on TCP Port 143?
IMAP4
POP4
Web-Based Email
SMTP
IMAP4
Instant Messaging Access Protocol v4
Which term describes the status of a Port that is part of an active, working endpoint pair?
established port
close-wait
listening port
open port
established port
A Port Number is an 8-bit value between 0 and 65535?
True
False
False
Which type of Port has a number in the 1024 to 49151 range?
dynamic
private
well-known
registered
registered
Connectionless sessions are designed to check for errors?
True
False
False
What name is given to the Port Numbers in the range of 0 to 1023?
private port numbers
listening ports
well-known port numbers
dynamic port numbers
well-known port numbers
Which Protocol involves a three-way handshake?
UDP
ICMP
TCP
IGMP
TCP
Transmission Control Protocol
The Internet Control Message Protocol (ICMP) works at Layer 3 to deliver Connection-Oriented Packets?
True
False
False
Explanation:
ICMP is Connectionless
Describe how you would view the information converning open sessions stored in RAM on a Windows Computer?
First, open the Command Prompt
Second, type netstat -n
This shows the raw Port Numbers and IP Addresses that are Active Sessions.
Explanation:
netstat -a shows all used Ports, including “Listening” Ports not engaged in Active Communications.
netstat -o adds Process IDs to the Table.
Describe how the Network Time Protocol (NTP) operates?
Operates in a hierarchical fashion or “Clock Strata”.
Uses UDP to Synchronize Time on a Network
Port 123, also uses SNTP (Simple Network Time Protocol)
Briefly describe Registered Ports?
Range between 1024 to 49151 and are NOT assigned or controlled, but can be “Registered” to prevent duplication.
Briefly explain HTTP’s weakness as regards to handling Web Pages?
It’s NOT Secure.
Port 80
Describe how the Zoom Client connects?
Uses a combination of TCP and UDP.
TCP connections are made using TLS.
UDP connections are encrypted with AES using key negotiated over TLS connection.
A Protocol that works on the surface exactly like Telnet, but has Security, is _________?
Secure Shell Service (SSH)
Dynamic Ports are also called ________?
Private Ports
Explanation:
Also known as Ephemeral Ports or even Non-Reserved Ports.
You can tell a Web Page is using HTTPS by the URL, which starts with ____________?
https://
With a _________ communication Protocol, there is no acknowledgement or any closing?
connectionless
Hypertext Transfer Protocol Secure (HTTPS) uses TCP Port ________?
443
Which term describes the status for a Socket that is prepared to respond to any traffic destined for the socket’s port number?
open port
closed-wait
ready port
established port
open port
A particular multicast called an IGMP group is assignde an address in which class range?
Class C
Class D
Class B
Class A
Class D
Which term defines a number used by the operating system to track all the running programs?
socket
private port number
dynamic port number
process ID (PID)
Process ID (PID)
Which term refers to the session information stored by a computer on one side of a session?
connection
packet
session
endpoint
endpoint
Many years ago, the ping command had a bug that allowed malicious users to send malformed ping packets to a destination, causing _______?
the blue screen of death
the ping of death
buffer overload
man-in-the middle attack
the ping of death
Mozilla Firefox is an example of a ________ application?
mail client
Web Server
FTP Client
Web Client
Web Client
The Web is composed of severs running Web server software, such as Apache HTTP Server, that speak the Hypertext Transfer Protocol (HTTP)?
True
False
True
Telnet runs on TCP ________?
port 21
port 23
port 25
port 22
port 23
Which command is universally known as the “Show me the Endpoint” Utility?
netstat
RSH
RCP
rlogin
netstat
Which Transport Layer Protocol does Trivial File Transfer Protocol (TFTP) use?
UDP
TCP
ICMP
IGMP
UDP
What File Transfer Protocol uses UDP Port 69?
FTP
TFTP
Web Browsing
Email
TFTP
Describe Active File Transfer Protocol (FTP)?
The FTP Client starts listening on a random Port for incoming data connections from the FTP Server, the FTP Client sends the FTP Request to inform the FTP Server on which Port it is Listening.
Describe how the Computers on each side of a Session keep track of the status of the Connection?
Session Information is stored in RAM called a Socket or Endpoint.
Describe the challenge associated with Multicast Communication and review how Multicast Communication operates, the IP Address Range involved, and the Protocol that makes this possible?
The Challenge - Determining who wants to receive the Multicast and who does NOT.
The Protocol - IGMP (Internet Group Management Protocol) enables Routers to communicate with hosts to determine a “group” of Memberships.
IP Address Range - Class D Range 224 - 239
Describe Query Language?
Refers to any computer programming language that requests and retrieves data from Database and Information Systems by sending Queries.
What is a Dumb Terminal?
It’s a Local System, generally a monitor, keyboard, and a mouse, but very little other processing power and features.
Can’t do any work on its own, even though it might look like a PC.
Think of it like a Command-Line window in Hardware Form.
Clearly defined ________ numbers exist for every popular or well-known TCP/IP Application?
Port
_________ was the original Protocol used on the Internet for Transferring Files?
FTP (File Transfer Protocol)
The Port Numbers from 1024 to 49151 are called _________ Ports?
Registered
Two mail server types dominate the once-fragmented email server space ____________ and Postfix?
Exim
The Internet Control Message Protocol (ICMP) works at ________ to deliver connectionless packets?
Layer 1
Layer 3
Layer 2
Layer 4
Layer 3 (Network)
Which Protocol is popular for moving files between computers on the same LAN, where the chances of losing packets are very small?
ICMP
SMTP
TFTP
HTTP
TFTP (Trivial File Transfer Protocol)
If you ping a device and no echo reply comes back before the default time, ping will respond with a _______ message?
server overload issue
hop count exceeded
request timed out
time to live (TTL) exceeded
request timed out
Briefly list and describe the three different protocols that the Internet uses to transfer and receive traditional Email?
SMTP - Simple Mail Transfer Protocol, Sends Email, Port 25.
POP3 - Post Office Protocol version 3, Retrieves Email, downloads the Email to your local Computer and removes it from the Server, and read them even when you are offline, Port 110.
IMAP - Internet Message Access Protocol, Retrieves Email, allows simultaneous access by multiple clients, more suitable if you’re accessing your Email from different locations or managed by multiple users, Port 143.
Briefly explain the relationship between the Web and the Internet?
Web - Pages you see when you’re at a device using a Web Browser.
Internet - Is the Network of Connected Computers that the Web works on.
Describe Exim?
It’s a Message Transfer Agent (MTA) Email Server serving millions of users daily.
Servers accept incoming Email and sort out the mail for recipients into individual storage area ___________?
mailboxes
Traditionally, FTP uses its ___________ process to Transfer Data?
active
__________ is used to Send Email messages via TCP Port 25?
SMTP (Simple Mail Transfer Protocol)
Active FTP uses TCP Ports ______ and ______ by default?
20
21
