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Questions and Answers
What is the primary function of the Ping tool in networking?
What is the primary function of the Ping tool in networking?
Ping checks the connectivity between devices.
Identify two protocols represented in the transport layer for the TCP/IP model.
Identify two protocols represented in the transport layer for the TCP/IP model.
TCP and UDP are the two protocols.
Explain the role of sequence and acknowledgment numbers in TCP.
Explain the role of sequence and acknowledgment numbers in TCP.
Sequence numbers allow the reordering of segments, while acknowledgment numbers confirm receipt.
What is the function of the Internet Group Message Protocol (IGMP)?
What is the function of the Internet Group Message Protocol (IGMP)?
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How does TCP segment a data stream for transmission?
How does TCP segment a data stream for transmission?
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What is the primary function of the Transmission Control Protocol (TCP) within the TCP/IP protocol suite?
What is the primary function of the Transmission Control Protocol (TCP) within the TCP/IP protocol suite?
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What are the two main components of a datagram in the IP layer?
What are the two main components of a datagram in the IP layer?
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Identify two advantages of using the TCP/IP protocol suite.
Identify two advantages of using the TCP/IP protocol suite.
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Explain what is meant by the term 'best-effort delivery' in the context of the Internet Protocol (IP).
Explain what is meant by the term 'best-effort delivery' in the context of the Internet Protocol (IP).
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Enumerate the three main protocols at the transport layer of the TCP/IP suite.
Enumerate the three main protocols at the transport layer of the TCP/IP suite.
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What is the role of the Network Access Layer in the TCP/IP protocol architecture?
What is the role of the Network Access Layer in the TCP/IP protocol architecture?
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What are the two versions of IP currently utilized in TCP/IP?
What are the two versions of IP currently utilized in TCP/IP?
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Name two disadvantages associated with the TCP/IP protocol suite.
Name two disadvantages associated with the TCP/IP protocol suite.
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What is the primary function of the Address Resolution Protocol (ARP)?
What is the primary function of the Address Resolution Protocol (ARP)?
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How does a device obtain the MAC address of a destination device using ARP?
How does a device obtain the MAC address of a destination device using ARP?
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What happens after a device receives the ARP reply?
What happens after a device receives the ARP reply?
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What is the purpose of the Reverse Address Resolution Protocol (RARP)?
What is the purpose of the Reverse Address Resolution Protocol (RARP)?
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What role does the Internet Control Message Protocol (ICMP) serve in networking?
What role does the Internet Control Message Protocol (ICMP) serve in networking?
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What utility in Microsoft Windows utilizes ICMP for its function?
What utility in Microsoft Windows utilizes ICMP for its function?
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Why doesn’t IP keep track of routes or reorder datagrams?
Why doesn’t IP keep track of routes or reorder datagrams?
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What is the significance of the command arp -a
?
What is the significance of the command arp -a
?
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What is the role of SNMP in network management?
What is the role of SNMP in network management?
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How does FTP differ from TFTP?
How does FTP differ from TFTP?
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What function does SMTP serve in email communication?
What function does SMTP serve in email communication?
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Explain the purpose of DNS in internet navigation.
Explain the purpose of DNS in internet navigation.
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What is the primary function of DHCP in a network?
What is the primary function of DHCP in a network?
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What is one key feature that differentiates TCP from UDP?
What is one key feature that differentiates TCP from UDP?
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Describe the purpose of NTP in networked devices.
Describe the purpose of NTP in networked devices.
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How does TCP ensure reliable data transmission?
How does TCP ensure reliable data transmission?
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What advantages does IMAP offer over POP for email management?
What advantages does IMAP offer over POP for email management?
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What function does Telnet provide for network communication?
What function does Telnet provide for network communication?
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What is the function of flow control in TCP?
What is the function of flow control in TCP?
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What port is typically used by web servers, and what protocol does it use?
What port is typically used by web servers, and what protocol does it use?
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Describe a characteristic of User Datagram Protocol (UDP).
Describe a characteristic of User Datagram Protocol (UDP).
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In TCP, how does sequencing of data packets contribute to reliability?
In TCP, how does sequencing of data packets contribute to reliability?
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What is the primary purpose of port numbers in TCP/IP?
What is the primary purpose of port numbers in TCP/IP?
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What application does the Stream Control Transmission Protocol (SCTP) support?
What application does the Stream Control Transmission Protocol (SCTP) support?
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What is a port address in the TCP/IP architecture?
What is a port address in the TCP/IP architecture?
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How does a sending computer ensure that data reaches the correct process on a receiving computer?
How does a sending computer ensure that data reaches the correct process on a receiving computer?
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What is the primary role of the transport layer in the context of port addresses?
What is the primary role of the transport layer in the context of port addresses?
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Explain how user-friendly addresses like e-mail and URLs are processed for communication over the Internet.
Explain how user-friendly addresses like e-mail and URLs are processed for communication over the Internet.
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Why is it necessary for a computer to have multiple port addresses when communicating over the Internet?
Why is it necessary for a computer to have multiple port addresses when communicating over the Internet?
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What steps does a packet undergo as it travels through the TCP/IP model?
What steps does a packet undergo as it travels through the TCP/IP model?
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Define the significance of encapsulation in data communication between processes in TCP/IP.
Define the significance of encapsulation in data communication between processes in TCP/IP.
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How do the concepts of source and destination addresses contribute to effective communication in TCP/IP?
How do the concepts of source and destination addresses contribute to effective communication in TCP/IP?
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Study Notes
TCP/IP Protocol Suite
- TCP/IP is an open standard protocol, not tied to one vendor
- It's the internet protocol
- Current version is TCP/IP v4
- Next version is TCP/IP v6
TCP/IP Architecture
- Hierarchical protocol made of interactive modules, each with specific functions
- Layers in the suite contain relatively independent protocols.
- Transport layer has three protocols: TCP, UDP, and SCTP
- Network layer's main protocol is IP, with supporting protocols ARP, RARP, ICMP, and IGMP
Some Protocols in TCP/IP Suite
- Protocols are organized in layers (Application, Transport, Network, Data Link, Physical)
- Examples of application layer protocols: SMTP, FTP, DNS, SNMP, NFS, TFTP, RPC
- Examples of transport layer protocols: TCP, UDP
- Examples of network layer protocols: IP, ICMP, IGMP
- Protocols at the network layer depend on those of the underlying networks
TCP/IP Advantages and Disadvantages
- Advantages: TCP/IP is standard, offers direct internet access, is routable, and cross-platform compatible.
- Disadvantages: It can be difficult to set up and might be slower than other protocols.
TCP/IP vs. OSI Model
- TCP/IP defines four layers, using different names for layers 1-3
- It combines layers 5-7 into a single application layer
Network Access Layer
- Includes Physical Layer (Transmission medium, Signal rate)
- Includes Data Link Layer (Logical interface, Hop-to-hop addressing, Error detection)
Internet Layer (IP Layer)
- Network layer protocol
- Datagram is the packet in the IP layer
- Datagram has a Header and Data portions
- IP relies on protocols ARP, RARP, ICMP, and IGMP for support
- Logical addressing used is IPV4 and IPV6
Internetworking Protocol (IP)
- Transmission mechanism used by TCP/IP
- Connectionless protocol, best-effort delivery service
- No error checking or tracking of datagrams
- Datagrams can arrive out of sequence or be duplicated
Address Resolution Protocol (ARP)
- Associates logical addresses with physical addresses
- Finds the physical address of a node given its internet address
- Used for local communication
Reverse Address Resolution Protocol (RARP)
- Allows a host to discover its internet address if it knows only its physical address
Internet Control Message Protocol (ICMP)
- Used by hosts and gateways to notify senders of datagram problems.
- Sends query and error messages
- Ping is an example
- Used in DOS attacks
Internet Group Message Protocol (IGMP)
- Facilitates simultaneous transmission of messages to groups of recipients
Transport Layer Protocols
- Traditionally represented by TCP and UDP
- Responsible for delivering messages between processes
- New protocol is SCTP
Transmission Control Protocol (TCP)
- Divides data stream into smaller segments with sequence numbers for reordering.
- Includes acknowledgment numbers for segments received and carried across the internet inside of IP datagrams.
- Collects datagrams at the receiving end, reorders, and handles error control.
- Characteristics: Use port numbers, Reliable, Connection-oriented, Full duplex, Error control, Flow control, Data recovery, Sequencing
User Datagram Protocol (UDP)
- Characteristics: Unreliable, Connectionless, Perform limited error checking, Simple structure, Offers best-effort delivery
Port Addresses
- Used to differentiate processes on computers
- TCP/IP port addresses are 16 bits in length
Specific Addresses
- Addresses are assigned by DNS
- User-friendly addresses (email, URLs) represent logical and port addresses
Stream Control Transmission Protocol (SCTP)
- Transport layer protocol that combines features of UDP and TCP.
- Supports voice over the internet and other communication methods
Application Layer
- Equivalent to the combined session, presentation, and application layers of OSI
- Protocols operate at this layer (e.g., DNS, FTP, SMTP, HTTP, POP, IMAP, NTP, Telnet, SSH, TFTP)
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Description
This quiz covers the essential aspects of the TCP/IP protocol suite, including its architecture, protocols, and the advantages and disadvantages of using TCP/IP. Understand the layers and protocols that make up this key technology of the internet.