Chpt 3

Which two protocols are service discovery protocols? (Choose two.)

DNS DHCP Service discovery protocols, such as DNS and DHCP enable automatic detection of service. DHCP is used to discover services for automatic IP address allocation and DNS for name-to-IP address resolution services.

Which two protocols belong in the TCP/IP model application layer?

DNS DHCP DHCP and DNS are both application layer protocols.

What is the process of converting information into the proper form for transmission?

Encoding One of the first steps to sending a message is encoding. During the encoding process, information is converted from its original form into an acceptable form for transmission.

Which protocol operates at the network access layer of the TCP/IP model?

Ethernet Ethernet is a network access layer protocol.

Which three are components of message timing? (Choose three.)

Flow control Access method response timeout Flow control is the managing of the rate of transmission. Response timeout is how long to wait for responses. Access methods determine when someone can send a message. These are the three components of message timing.

Which step of the communication process is concerned with properly identifying the address of the sender and receiver?

Formatting Messages sent over a computer network must be in the correct format for them to be delivered and processed. Part of the formatting process is properly identifying the source of the message and its destination.

Which of the following are protocols that provide feedback from the destination host to the source host regarding errors in packet delivery? (Choose two.)

ICMPv4 ICMPv6 ICMPv4 and ICMPv6 provide feedback when errors occur.

This protocol is responsible for guaranteeing the reliable delivery of information.

IP (Internet Protocol) Transmission Control Protocol (TCP) manages the conversation between end devices and guarantees the reliable delivery of information.

A device receives a data link frame with data and processes and removes the Ethernet information. What information would be the next to be processed by the receiving device?

IP at the internet layer Data is de-encapsulated so the next layer to receive the data would be the internet layer.

This standards organization is responsible for IP address allocation and domain name management.

Internet Assigned Numbers Authority (IANA) IANA is responsible for overseeing and managing IP address allocation, domain name management, and protocol identifiers for ICANN.

This standards organization is concerned with the Request for Comments (RFC) documents that specify new protocols and update existing ones.

Internet Enginnering Task Force (IETF) The IETF develops and maintains the specifications for new protocols and updates to existing protocols through published documents called Request for Comments (RFCs).

What is used to determine the network portion of an IPv4 address?

It is the subnet mask used in IPv4 that is used to determine the network portion of an IPv4 address.

Which delivery method is used to transmit information to one or more end devices, but not all devices on the network?

Multicast Multicast messages are addressed for transmission to one or more end devices on a network. Broadcast messages are addressed for transmission to all devices on the network. Unicast messages are addressed for transmission to one device on the network.

Which of the following statements are true regarding network layer and data link layer addresses? (Choose three.)

Network layer addresses are logical and data link addresses are expressed as 12 hexadecimal digits data link layer addresses are physical and network layer addresses are logical network layer addresses are either 32 or 128 bits in length MAC addresses are physical addresses and 48 bits or 12 hex digits in length. IPv4 addresses and IPv6 addresses are logical. IPv4 addresses are 32 bits and IPv6 addresses are 128 bits.

Which services are provided by the internet layer of the TCP/IP protocol suite? (Choose three.)

Routing Protocols Messaging Internet Protocol IP (Internet Protocol), ICMP (Messaging), and Routing Protocols are services provided at the Internet Layer.

True or False? Data Link addresses are physical so they never change in the data link frame from source to destination

The correct answer is False. Data link addresses change within the data link frame when the receiving device is not on the same network.

True or false? The right-most part of an IP address is used to identify the network that a device belongs to.

The correct answer is False. It is the left-most portion of an IP address that identifies the network. The right-most portion is used to identify the specific device or interface.

True or false. Standards organizations are usually vendor-neutral.

True The correct answer is True. Most standards organizations are vendor-neutral, non-profit organizations that develop and promote open standards.

True or false? Frames exchanged between devices in different IP networks must be forwarded to a default gateway.

True The correct answer is True. When two devices are on different IP networks, frames cannot be sent directly to the receiver since it is on a different logical network. The frames must first be forwarded to a default gateway (router).

Which protocol stack layer encapsulates data into frames?

data link The data link layer encapsulates data into a frame.

What is the order of the two addresses in the data link frame?

destination MAC, Source MAC The data link frame addressing consists of a destination and source MAC address in that order.

What types of standards are developed by the Electronics Industries Alliance (EIA)?

electric wiring and connectors The Electronics Industries Alliance (EIA) develops standards related to electrical wiring, connectors, and network equipment racks.

What is the name of the process of adding protocol information to data as it moves down the protocol stack?

encapsulation As data moves down the protocol stack, protocol data is added to the original data. This process is known as encapsulation.

BGP and OSPF are examples of which type of protocol?

routing BGP and OSPF are routing protocols. They enable routers to exchange route information to reach remote networks.

What is the PDU associated with the transport layer?

segment The transport layer PDU is known as a segment.

What is the process of dividing a large data stream into smaller pieces prior to transmission?

segmentation Segmentation is the process of dividing a large data stream into smaller pieces which are then transmitted to the receiver.

What is the purpose of the sequencing function in network communication?

to uniquely label transmitted segments of data for proper reassembly by the receiver Sequencing uniquely identifies or labels each transmitted segment with a sequence number that is used by the receiver to reassemble the segments in the proper order.

UDP and TCP belong to which layer of the TCP/IP protocol?

transport TCP and UDP are both transport layer protocols.