Networking Final

Front 1

Full-duplex

Back 1

Method of transmission allows signals to travel in both directions over a medium simultaneously.

Front 2

Tasks handled by a router?

Back 2

1. A router can reroute traffic if the path of first choice is down but a second path is available

2.A router can interpret Layer 3 and often Layer 4 addressing.

3.A router can connect dissimilar networks.

Front 3

Network Time Protocol (NTP)

Back 3

Is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks.

Front 4

Simple Mail Transfer Protocol (SMTP)

Back 4

Is an Internet standard for electronic mail (email) transmission. First defined by RFC 821 in 1982, it was last updated in 2008 with the Extended SMTP additions by RFC 5321—which is the protocol in widespread use today. SMTP by default uses TCP port 25.

Front 5

Session Initiation Protocol (SIP)

Back 5

Is a communications protocol for signaling and controlling multimedia communication sessions. The most common applications of SIP are in Internet telephony for voice and video calls, as well as instant messaging, over Internet Protocol (IP) networks.

Front 6

Each organization that provides host services on the public Internet is responsible for providing and maintaining DNS authoritative servers for public access.​

Back 6

True

Front 7

Traceroute

Back 7

By default, sends a sequence ofUser Datagram Protocol (UDP) packets addressed to a destination host; ICMP Echo Request or TCP SYN packets can also be used. The time-to-live (TTL) value, also known as hop limit, is used in determining the intermediate routers being traversed towards the destination.

Front 8

A standard network switch operates at what layer of the OSI model?

Back 8

Layer 2

Front 9

Layer 1

(Physical)

Back 9

In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first (lowest) layer. The implementation of this layer is often termed PHY. The physical layer consists of the basic networking hardware transmission technologies of a network.

Data unit : Bit

Front 10

Layer 2

(Data Link)

Back 10

Layer 2 refers to the Data Link layer of the commonly referenced multilayered communication model, Open Systems Interconnection (OSI). The Data Link layer is concerned with moving data across the physical links in the network.

Data unit : Frame

Front 11

Layer 3

(Network)

Back 11

Structuring and managing a multi-node network, including addressing,routing and traffic control.

Data unit : Packet

Front 12

Layer 4

(Transport)

Back 12

Reliable transmission of data segments between points on a network, including segmentation, acknowledgement and multiplexing.

Data unit :Segments/Datagram

Front 13

Layer 5

Session

Back 13

Managing communication sessions, i.e. continuous exchange of information in the form of multiple back-and-forth transmissions between two nodes

Front 14

Layer 6

Presentation

Back 14

Translation of data between a networking service and an application; including character encoding, data compression and encryption/decryption.

Front 15

Layer 7

Back 15

High-level APIs, including resource sharing, remote file access,directory services and virtual terminals.

Front 16

SSH

Back 16

Is typically used to log into a remote machine and execute commands, but it also supports tunneling, forwarding TCP ports and X11 connections; it can transfer files using the associated SSH file transfer (SFTP) or secure copy (SCP) protocols. SSH uses the client-server model.

Front 17

Telnet

Back 17

Telnet is an application layer protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection.

Front 18

How far away from fluorescent lights or other sources of EMI should cable be installed?

Back 18

at least 3 feet

Front 19

Select the layer of the OSI model that is responsible for reformatting, compressing, and/or encrypting data in a way that the application on the receiving end can read:​

Back 19

Presentation

Front 20

IPv6 global unicast address:

Back 20

FE80::10

Front 21

What is the name for the protocol data unit (PDU) ​of the Data Link layer?

Back 21

​frame

Front 22

An open electrical circuit as a result of a failed circuit breaker is considered to be what type of failure system?

Back 22

​fail-close

Front 23

BIND

Back 23

name of the free, open source software that is by far the most popular DNS server software

Front 24

Convergence time

Back 24

Routing protocol criteria is defined as the time it takes to recognize a best path change in the event of a network outage?

Front 25

​Sliding window

Back 25

In a TCP segment, the field that indicates how many bytes the sender can issue to a receiver while acknowledgement for the segment is outstanding?

Front 26

​Material Safety Data Sheet (MSDS)

Back 26

The proper handling procedures for substances such as chemical solvents.

Front 27

A hexadecimal number is a number written in the base 16 number system.​

Back 27

True

Front 28

​Noise

Back 28

Type of power flaw that involves a fluctuation in voltage levels caused by other devices on the network or by EMI.

Front 29

A port number, which identifies an application on a host, exists at what level of the OSI model?

Back 29

Transport

Front 30

What two mail delivery protocols below can be used by a client application to receive e-mail from a server?​

Back 30

IMAP4 (Internet Mail Access Protocol V4)

POP3 (Post Office Protocol 3)

Front 31

Equipment racks most commonly come in what two widths?​

Back 31

19 inch frame

23 inch frame

Front 32

What TCP field below allows the receiving node to determine whether a TCP segment is corrupted during transmission?​

Back 32

checksum

Front 33

ICANN is responsible for restrictions on use of the .com, .org, and .net TLDs.

Back 33

False

Front 34

DNS follows a centralized database model.​

Back 34

False

Front 35

Domain Name System (DNS)

Back 35

Is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities.

Front 36

Static electricity​

Back 36

A stationary electric charge, typically produced by friction

Front 37

Transport Layer Security (TLS)

Back 37

and its predecessor, Secure Sockets Layer (SSL), both of which are frequently referred to as 'SSL', are cryptographic protocols designed to provide communications security over a computer network

Front 38

SSL (Secure Sockets Layer)

Back 38

Is the standard security technology for establishing an encrypted link between a web server and a browser. This link ensures that all data passed between the web server and browsers remain private and integral.

Front 39

Transmission Control Protocol (TCP)

Back 39

TCP is one of the main protocols in TCP/IP networks. Whereas the IP protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent.

Front 40

User Datagram Protocol (UDP)

Back 40

The User Datagram Protocol (UDP) is a transport layer protocol defined for use with the IP network layer protocol.

Front 41

What are the two main Transport Layer protocols?​

Back 41

TCP​

​UDP

Front 42

What two fields below are used by IPv4 and IPv6 respectively to limit the number of times that a packet can be forwarded on a network?

Back 42

TTL

​hop limit

Front 43

What utility is used to verify that TCP/IP installed, bound to the NIC, configured correctly, and communicating with the network?​

Back 43

​ping

Front 44

What mail protocol is used to send mail messages to a server?​

Back 44

SMTP (Simple Mail Transfer Protocol)

Front 45

IP is an unreliable, connectionless protocol.​

Back 45

True

Front 46

What range of ports is referred to as the "well-known" range of ports?

Back 46

​0-1023

Front 47

​The IP connectionless protocol relies on what other protocol to guarantee delivery of data?

Back 47

TCP

Front 48

Which of the following are types of entries an ARP table contains?

Back 48

​Static

Dynamic

Front 49

Three characteristics of TCP in its role as a reliable delivery protocol?​

Back 49

1. Connection-oriented Protocol

2. Sequencing and checksums

3. ​Flow Control

Front 50

A power fluctuation that results in a temporary dimming of lights is known as a blackout.​

Back 50

False

Front 51

Which of the following options is not a likely source of electromagnetic interference?​

Back 51

fiber optic cables

Front 52

If a Network layer protocol is aware that a packet is larger than the maximum size for its network, it will divide the packet into smaller packets in a process known as:​

Back 52

​fragmentation

Front 53

A loopback IP address begins with what ​number?

Back 53

127

Front 54

​What physical network topology consists of all connected devices connecting to one central device, such as a switch?

Back 54

star topology

Front 55

The segment or datagram protocol data unit exists at what layer of the OSI model?

Back 55

Transport layer

Front 56

What command below can be used to display ​a complete summary of all network interfaces in a Windows computer?

Back 56

ipconfig /all

Front 57

The process of adding a header to the data inherited from the layer above is called what option below?

Back 57

​encapsulation

Front 58

The Network Time Protocol service uses what port number?

Back 58

UDP 123

Front 59

Which protocol below is used to make an initial connection between hosts for transferring multimedia data, relying on other protocols once a connection is established?

Back 59

SIP (Session Initiation Protocol)

Front 60

​What versions of the IP protocol are used on networks today?

Back 60

IPv4

​IPv6

Front 61

What happens when a router receives a packet with a TTL of 0?

Back 61

The router drops the packet and sends an ICMP TTL expired message back to the host.

Front 62

When viewing the routing table on a UNIX system, what flag indicates if a route is a usable route?

Back 62

U

Front 63

​Windows, UNIX, Linux, and Mac OS clients are all capable of connecting to a VPN using PPTP.

Back 63

True

Front 64

What authentication protocol sends authentication information in cleartext without encryption?

Back 64

PAP

Front 65

Which of the following connectors is the most common for multimode fiber?

Back 65

MT-RJ

Front 66

What signal propagation phenomena causes a wireless signal to split into secondary waves when it encounters an obstruction?

Back 66

diffraction

Front 67

Using a form of transmission that allows multiple signals to travel simultaneously over one medium is known as which of the following options?​

Back 67

multiplexing

Front 68

Which software below serves as the firewall for Linux systems?

Back 68

iptables

Front 69

Unlike wired signals, wireless signals originate from electrical current traveling along a capacitor.​

Back 69

False

Front 70

Wireless signals

Back 70

Wireless signals are electromagnetic waves travelling through the air

Front 71

What is the maximum supported throughput of a CAT6 cable?​

Back 71

10 Gbps

Front 72

What security encryption protocol requires regular re-establishment of a connection and can be used with any type of TCP/IP transmission?

Back 72

IPSec

Front 73

Internet Protocol Security (IPsec)

Back 73

Internet Protocol Security (IPsec) is a protocol suite for secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session.

Front 74

Layer 2 Tunneling Protocol (L2TP)

Back 74

In computer networking, Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs. It does not provide any encryption or confidentiality by itself.

Front 75

​A reflective attack can be increased in intensity by combining it with what type of attack?

Back 75

amplification attack

Front 76

Smurf Attack

Back 76

The Smurf Attack is a distributed denial-of-service attack in which large numbers of Internet Control Message Protocol (ICMP) packets with the intended victim's spoofed source IP are broadcast to a computer network using an IP Broadcast address.

Front 77

What is the minimum category of UTP cable required in order to support Gigabit speeds?​

Back 77

Cat 5e

Front 78

What is the maximum distance for 10GBase-ER and 10GBase-EW on a segment of single mode fiber?

Back 78

40km

Front 79

Because digital signals do not depend on amplitude or frequency differences to communicate information, they are more vulnerable to EMI noise.​

Back 79

False

Front 80

In IEEE terminology, a group of stations that share an access point are said to be part of what option below?

Back 80

basic service set

Front 81

NFC tags are very expensive and cannot be purchased blank, requiring them to be pre-loaded.​

Back 81

False

Front 82

A proxy that provides Internet clients access to services on its own network is known as what type of proxy?

Back 82

reverse proxy

Front 83

The term malware is derived from a combination of the words malicious and software.​

Back 83

True

Front 84

logic bomb

Back 84

A logic bomb is a piece of code intentionally inserted into a software system that will set off a malicious function when specified conditions are met.

Front 85

boot sector virus

Back 85

A boot sector virus is a virus that infects the master boot record of a storage device, usually a floppy disk or a hard drive but occasionally a CD.

Front 86

worm

Back 86

A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. Often, it uses a computer network to spread itself, relying on security failures on the target computer to access it. Unlike a computer virus, it does not need to attach itself to an existing program.