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Flashcards in Network+ Chapter 2 Deck (26):

____________is a conceptual blueprint of how communications should take place. Ch 2 pg 28

reference model


How many layers are their to the OSI model and name each layer in order? Ch 2 Pg 30

Application (Layer 7)
Presentation (Layer 6)
Session (Layer 5)
Transport (Layer 4)
Network (Layer 3)
Data Link (Layer 2)
Physical (Layer 1)


How do some people remember the the OSI Model? Ch 2 Pg 30

(To remember the seven layers (starting at Layer 1 and moving up to Layer 7).


Within the OSI model at which layer does File,Print,message,database, and application services reside? Cg 2 pg 30

Application Layer


Within the OSI model at which layer does Data Encryption, Compression and translation services reside? Cg 2 pg 30



Within the OSI model at which layer does the End to End connection services reside? Cg 2 pg 30



Within the OSI model at which layer does Framing reside? Cg 2 pg 30

Data Link


How does the Presentation layer get its name? Ch 2 pg 33

It presents data to the Application layer and is responsible for data translation and code formatting.


What is the Session Layer responsible for? Ch 2 pg 33

is responsible for setting up, managing, and then tearing down sessions between Presentation layer entities.


__________is responsible for setting up, managing, and then tearing down sessions between Presentation layer entities. Ch 2 pg 33

Session Layer


The session layer coordinates communication between systems and serves to organize their communication
by offering these three different modes: Ch 2 pg 33

simplex, half duplex, and full duplex


The term__________ can be used at the Transport layer. Ch 2 pg 33

reliable networking-(It means that acknowledgments, sequencing, and flow control will be used.)


define the the three-way handshake? pg 34

1)The first “connection agreement” segment is a request for synchronization.
2)The next segments acknowledge the request and establish connection parameters—the
rules—between hosts. These segments request that the receiver’s sequencing is synchronized
here as well so that a bidirectional connection is formed.
3)The final segment is also an acknowledgment. It notifies the destination host that the
connection agreement has been accepted and that the connection has been established.
Data transfer can now begin.


Data integrity is ensured at the ____________ by maintaining____________and by allowing users to request reliable data transport between systems. Ch 2-pg 35

Transport layer
Flow control


A virtual circuit is set up (such as a three-way handshake).

1) It uses sequencing.
2) It uses acknowledgments.
3) It uses flow control.


a technique that requires a receiving machine to communicate with the transmitting source by sending an acknowledgment message back to the sender when it
receives data. Ch 2-pg 38

positive acknowledgment with retransmission


These are used to transport user data through the internetwork. Ch 2-pg 40

Data packets


Two examples of routed protocols are? Ch 2-pg 40

IP and IPv6


These are used to update neighboring routers about the networks connected to all routers within the internetwork
Ch 2-pg 40

Route-update packets


What are 3 common routing protocols?
Ch 2-pg 40

Routing Information Protocol (RIP),
RIPv2, Enhanced Interior Gateway Routing Protocol (EIGRP)
Open Shortest Path First (OSPF).


Route-update packets are used for what? ch 2 pg 40

help build and maintain routing tables on each router.


Here are some points about routers that you should definitely commit to memory: ch 2 pg 41

1) Routers, by default, won’t forward any broadcast or multicast packets.
2) Routers use the logical address in a Network layer header to determine the next-hop
router to forward the packet to.
3) Routers can use access lists, created by an administrator, to control security on the types of packets that are allowed to enter or exit an interface.
4) Routers can provide Layer 2 bridging functions if needed and can simultaneously route
through the same interface.
5) Layer 3 devices (routers, in this case) provide connections between virtual LANs (VLANs).
6) Routers can provide quality of service (QoS) for specific types of network traffic.


true of false Routers can also be referred to as a Layer 4 switch. ch 2 pg 41

False- a layer 3 switch is referred to a router.


This Layer in the OSI Model provides the physical transmission of the data and handles error notification, network topology, and flow control. ch 2 pg 41

Data Link layer


The Data Link layer formats the message into pieces, each called a _________, and adds a customized header containing the destination and source hardware address.

ch 2 pg 41

data frame


The IEEE Ethernet Data Link layer has two sublayers:

ch 2 pg 43

Media Access Control (MAC)
Logical Link Control (LLC)