Comptia Network+ (N10-006) Part 1: Understanding Networks

Front 1

What is the maximum size of a frame?

Back 1

1500 bytes, or 12,000 bits

Hint 1

Bytes

Front 2

Where is a frame created?

Back 2

In the network card (NIC)

Front 3

What comprises an Ethernet frame?

Back 3

Frame header (destination and last router MAC address); IP packet; data segment; frame trailer (CRC).

Front 4

What comprises an IP packet?

Back 4

Header (destination and originating computer IP addresses); data (TCP data segment/UDP datagram, e.g.).

Front 5

How long is a MAC address?

Back 5

48 bits, or 12 hexadecimal characters

Front 6

What is the OEM section of a MAC address?

Back 6

The first half (24 bits, or 6 hex chars)

Front 7

What is the unique identifier of a MAC address?

Back 7

The last half (24 bits, or 6 hex chars)

Front 8

What is the purpose of a MAC address?

Back 8

A unique identifier for a network card. The destination and origination MAC addresses are included in each frame.

Hint 8

ID

Front 9

What's the difference between broadcast and unicast?

Back 9

Unicast is directed to specific MAC addresse(s); broadcast is intended for all MAC addresses on the network.

Hint 9

Communication

Front 10

What is a broadcast MAC address?

Back 10

FF-FF-FF-FF-FF-FF

Hint 10

Last char

Front 11

What is a broadcast domain?

Back 11

Any group of networked computers that can communicate with each other.

Hint 11

Communication

Front 12

What are the differences between hubs, switches, and routers?

Back 12

A hub simply replicates all frames to all ports; a switch forwards frames to the intended port only (within the same network); a router connects separate networks.

Hint 12

Targeting

Front 13

What's the advantage of logical addressing over MAC addresses?

Back 13

Logical addressing defines networks.

Front 14

What's the purpose of a routing table?

Back 14

Routing tables are used by routers to direct packets to the correct switch, based on the destination IP address.

Hint 14

Routers

Front 15

What's the difference between TCP (Transmission Control Protocol) and UDP (User Datagram Protocol)?

Back 15

TCP - re-assembles packets into complete data, using the sequence number in the packet.

UDP - packet assembly is handled by the application.

Front 16

What are a couple of good mnemonics for the OSI model?

Back 16

1-7: Please Do Not Throw Sausage Pizza Away.

7-1: All People Seem To Need Data Processing

Front 17

What are the seven layers of the OSI model?

Back 17

7 - Appliation

6 - Presentation

5 - Session

4 - Transport

3 - Network

2 - Data Link

1 - Physical

Front 18

What's a good mnemonic for the TCP/IP model?

Back 18

4-1: It's in A TIN

Front 19

What are the four layers of the TCP/IP model?

Back 19

4 - Application

3 - Transport

2 - Internet

1 - Network Interface (a.k.a. Link)

Front 20

What is the function of the Application layer of the OSI model, and what is the corresponding TCP/IP model layer?

Back 20

The application's ability to access network resources - network awareness. TCP/IP Application layer (#4). (Data portion of IP packet)

Front 21

What is the function of the Presentation layer of the OSI model, and the corresponding TCP/IP model layer(s)?

Back 21

Translates data from the format used by applications to one that can be transmitted. Includes encryption. TCP/IP Application layer (#4). (Data formatting of IP packet)

Front 22

What is the function of the Session layer of the OSI model, and the corresponding TCP/IP model layer(s)?

Back 22

Establishes, maintains, and synchronizes data exchange between endpoints. TCP/IP Application layer (#4). (API of IP packet)

Front 23

What is the function of the Transport layer of the OSI model, and the corresponding TCP/IP model layer(s)?

Back 23

Connection services between devices and reliability of data. TCP/IP Transport layer (#3). (Sequence and port information of IP packet)

Front 24

What is the function of the Network layer of the OSI model, and the corresponding TCP/IP model layer(s)?

Back 24

Discovery of destination systems and addressing, and mechanism by which data can be routed from one network to another. TCP/IP Transport layer (#2). (IP addresses of IP packet)

Front 25

What is the function of the Data Link layer of the OSI model, and the corresponding TCP/IP model layer(s)?

Back 25

Error detection and correction and hardware addressing (MACs). TCP/IP Transport layer (#1). (MAC addresses of IP packet)

Front 26

What is the function of the Physical layer of the OSI model, and the corresponding TCP/IP model layer(s)?

Back 26

Defines the physical structure of the network and the topology. TCP/IP Network Interface (Link) layer (#1).

Front 27

What does the Application layer of the TCP/IP model define, and the corresponding OSI model layer(s)?

Back 27

Port numbers. OSI Application (#7); Presentation (#6); and Session (#5) layers.

Front 28

What does the Transport layer of the TCP/IP model define, and the corresponding OSI model layer(s)?

Back 28

Assembly/disassembly of data into packets and the connection type (TCP vs UDP, e.g.). OSI Transport (#4) layer.

Front 29

What does the Internet layer of the TCP/IP model define, and the corresponding OSI model layer(s)?

Back 29

IP addresses and routers. OSI Network (#3) layer.

Front 30

What does the Network layer of the TCP/IP model define, and the corresponding OSI model layer(s)?

Back 30

Physical cabling, MAC addresses, NICs, switches. OSI Data Link (#2) and Physical (#1) layers.

Front 31

What is included in the Physical layer of the OSI model?

Back 31

Hardware and topology

Front 32

What is included in the Data Link layer of the OSI model?

Back 32

MAC addressing (not including routers) and error/flow-control mechanisms, including High-Level Data Link Control (HDLC), Layer 2 Tunneling Protocol (L2TP), Point-to-Point Protocol (PPP), Point-to-Point Tunneling Protocol (PPTP), Spanning Tree Protocol (STP), virtual LANs (VLANS).

Front 33

What is included in the Network layer of the OSI model?

Back 33

Routing mechanisms using IP addresses. Routing Information Protocol (RIP), Open Shortest Path First (OSPF), Address Resolution Protocol (ARP), Reverse Address Resolution Protocol (RARP), Asynchronous Transfer Mode (ATM), Intermediate System-to-Intermediate System (IS-IS), IP Security (IPsec), Multiprotocol Label Switching (MLPS)

Front 34

What is included in the Transport layer of the OSI model?

Back 34

Error checking, segmentation, service addressing, buffering, and windowing at the device level.

Front 35

What is included in the Session layer of the OSI model?

Back 35

Synchronization of data between applications. Similar to Transport layer, but at application level. NetBIOS, Network File System (NFS), Server Message Block (SMB).

Front 36

What is included in the Presentation layer of the OSI model?

Back 36

Transfer of data into a specific format - graphics, sound, or text to a specific file format, e.g. Also includes encryption and compression.

Front 37

What is included in the Application layer of the OSI model?

Back 37

Definition of processes that enable applications to use network services. DHCP, DNS, RTP, FTP, HTTP, POP3, etc.

Front 38

What device(s) work at the Physical layer of the OSI model?

Back 38

Hubs

Front 39

What device(s) work at the Data Link layer of the OSI model?

Back 39

Wireless bridges, switches, NICs, access points

Front 40

What device(s) work at the Network layer of the OSI model?

Back 40

Routers