Vocab

Question 1

What does the ping function do? What is the syntax for the function?

Answer 1

“ping” will test the connectivity to a remote network/site (using IP address)
“ping” will be followed by the IP address or the domain name of the site that will be tested.

Question 2

What does DNS stand for? What does it do? Why?

Answer 2

DNS = Domain Name Server
DNS is used to translate URLs into IP addresses. By doing so, the system is able to accurately decipher the location on the network/internet of the data requested.

Question 3

What does the function tracert do? What is the syntax for the function?

Answer 3

tracert checks the path to the remote network/site. This is done by showing each “step” (switch/router routing) that is taken in order to reach the requested IP.
tracert will be followed by the IP address or the domain name of the site that is being checked.

Question 4

What does IP address stand for? What is an IP address?

Answer 4

IP address = Internet Protocol address
An IP address is a numerical address assigned to every device on a computer network that uses the Internet Protocol for communication.

Question 5

What does DHCP stand for? What is DHCP?

Answer 5

DHCP = Dynamic Host Control Protcol
DHCP is the process in which a router assigns IP addresses to connected devices from a pool of unused IP addresses as they join the network.

Question 6

What are the Two Network Components?

Answer 6

Physical and Logical Connections

Question 7

Describe the Physical Component of the Network.

Answer 7

The physical component is used to create a physical topology. Any kind of physical connection in a computer network. This can be seen as various types of cables being plugged into a Network Interface Card (NIC).

Question 8

Describe the Logical component of the Network.

Answer 8

The logical component is used to determine how wireless data is sent and received to the system. (Internet Protocols)

Question 9

What does OSI stand for? What is OSI?

Answer 9

OSI = Open Systems Interconnections model
The OSI model seeks to standardize how devices communicate with each other on a network. This is done through a multi-layered approach in communication between devices on a network.

Question 10

What does ISO stand for?

Answer 10

ISO = International Organization for Standardization

Question 11

Distance from the reference clock

Answer 11

stratum

Question 12

Belongs to and carries the traffic of only one VLAN

Answer 12

Access port (no tagging)

Question 13

Way of explicitly tagging VLAN info onto an ethernet frame

Answer 13

Inter-switch Link (ISL)

Question 14

Standard of inserting a field into the frame to identify the VLAN

Answer 14

IEEE 802.1q

Question 15

Number of bits in the VLAN ID in an 802.1q tag

Answer 15

12

Question 16

A list of conditions that categorize packets to filter unwanted packets when implementing security policies

Answer 16

Access list (ACLs)

Question 17

Access list that uses only the source IP in a packet as the condition test

Answer 17

Standard Access List

Question 18

Access list that can evaluate source and destination IP, the protocol field in the network layer, and the port number at the transparent layer

Answer 18

Extended Access List

Question 19

Value that indicated NTP prioity

Answer 19

stratum 1-15

Question 20

Extended Access-List Number Ranges

Answer 20

100-199 and 2000-2699

Question 21

Standard Access-List Number Ranges

Answer 21

1-99 and 1300-1999

Question 22

Default Config Setting

Answer 22

0x2102

Question 23

Setting to bypass the config in NVRAM to perform password recovery

Answer 23

0x2142

Question 24

Allows you to store messages that are time-stamped, sequenced, and display severity levels

Answer 24

syslog

Question 25

severity level where system is unusable

Answer 25

Emergency | severity 0

Question 26

Severity level where immediate action is needed

Answer 26

Alert (severity 1)

Question 27

Severity level of critical conditions

Answer 27

Critical (severity 2)

Question 28

Severity level of error conditions

Answer 28

Error (severity 3)

Question 29

Severity level of warning conditions

Answer 29

Warning (Severity 4)

Question 30

Severity level of normal but a significant condition has occurred

Answer 30

Notification (severity 5)

Question 31

Security level with a debugging message

Answer 31

Debugging (severity 7)

Question 32

Security level of normal information message

Answer 32

Informational (severity 6)

Question 33

Config your router interface to forward the DHCP client requests

Answer 33

DHCP relay

Question 34

Component that brings a router up during initialization and loads the IOS

Answer 34

bootstrap

Question 35

Component used to check the basic functionality of the router hardware and det. which interfaces are present

Answer 35

POST (Power-On Self-Test)

Question 36

Component used for manufacturing, testing, and troubleshooting. Runs a mini-IOS when IOS in flash fails to load

Answer 36

ROM monitior

Question 37

Component used to bring up an interface and load a cisco IOS into flash memory

Answer 37

Mini-IOS

Question 38

Component used to hold packet buffers, ARP cache, routing tables, and running-config

Answer 38

RAM (Random access memory)

Question 39

Component used to start and maintain the router, contains POST and bootsrap

Answer 39

ROM (read-only memory)

Question 40

Component that stores the cisco IOS by default

Answer 40

Flash memory

Question 41

Component used to hold the router and switch config

Answer 41

NVRAM (non-volatile RAM)

Question 42

Component used to control how the router boots up

Answer 42

Configuration register

Question 43

Application that assigns IP addresses to hosts

Answer 43

DHCP (Dynamic Host Configuration Protocol)

Question 44

List the four step process hosts use to gen an address from a server

Answer 44

1. ) DHCP discovery 2. ) Layer 2 unicast DHCP offer 3. ) DHCP request 4. ) Unicast DHCP acknowledgement

Question 45

Minimum requirements to configure a DHCP server

Answer 45

1. ) Network and mask for each LAN 2. ) Reserved/Excluded addresses 3. ) Default router 4. ) DNS address

Question 46

Application that resolves hostnames to IP addresses

Answer 46

DNS (Domain Name Service)

Question 47

ICMPv6 process that prevents IPv6 from doing any fragmentation

Answer 47

path MTU discovery

Question 48

ICMPv6 process of finding addresses of other devices on the local link

Answer 48

NDP (Neighbor Discovery Protocol)

Question 49

A function of NS/NA messages that asks if anyone has this same address

Answer 49

DAD (Duplicate Address Detection) | 3 DADs sent out

Question 50

Complex PAcket forwarding technique that involves looking up every destination in the routing table and finding the exit interface for every packet

Answer 50

Process Switching

Question 51

First step in Stateless Auto-configuration

Answer 51

RS (Router solicitation) request is sent out from a host as a multicast ICMP message

Question 52

Second step in Stateless Auto-configuration

Answer 52

Router replies with the prefix info in a RA (Router advertisement)

Question 53

Forwarding technique that uses a cache to store the most recently used destination so that lookups are not required for every packet

Answer 53

Fast Switching

Question 54

Forwarding technique that makes multiple cache tables and is altered whenever the network topology changes

Answer 54

CEF (Cisco Express Forwarding)

Question 55

Either a single network or a collection of networks under a common administrative domain

Answer 55

AS (Autonomous system) which is an IGP (interior gateway protocol)

Question 56

Protocol used to communicate between AS

Answer 56

EGP (Exterior Gateway Protocol) | Ex: BGP (Border Gateway Protocol)

Question 57

Used to rate the trustworthiness of routing information received on a router from a neighbor router

Answer 57

AD (Administrative Distance) 0 - 255 Lower num means more trust

Question 58

Class of routing protocols that finds the best path to a remote network by judging distance

Answer 58

Distance Vector

Question 59

Class of routing protocols that creates three tables: a table for directly attached neighbors, one to det. the topology of the entire netowrk, and one for a routing table

Answer 59

Link State

Question 60

Which routing protocol uses periodic keep-alives are exchanged between directly connected neighbors to establish and maintain neighbor relationships

Answer 60

Link State

Question 61

Parameters of RIP (Routing Information Protocol)

Answer 61

Complete table sent out every 30 sec Relies on hop count Max allowable hop count of 15

Question 62

Class of routing protocols that use both link state and distance vector

Answer 62

Advanced Distance Vector

Question 63

AD of a connected interface

Answer 63

0

Question 64

AD of a Static Route

Answer 64

1

Question 65

AD of EIGRP

Answer 65

90

Question 66

AD of OSPF

Answer 66

110

Question 67

AD of RIP

Answer 67

120

Question 68

Port Number of FTP (File Transfer Protocol)

Answer 68

TCP 20 and 21

Question 69

Port Number of SSH (Secure Shell)

Answer 69

TCP 22

Question 70

Port Number of SFTP (Secure FTP)

Answer 70

TCP 22

Question 71

Port Number of SCP (Secure Copy)

Answer 71

TCP 22

Question 72

Port Number of Telnet

Answer 72

TCP 23

Question 73

Port Number of SMTP (Simple Mail Transfer Protocol)

Answer 73

TCP 25

Question 74

Port Number of DNS (Domain Name System)

Answer 74

TCP/UDP 53

Question 75

Port Number of TFTP (Trivial File Transfer Protocol)

Answer 75

UDP 69

Question 76

Port Number of DHCP (Dynamic Host Config Protocol)

Answer 76

UDP 67

Question 77

Port Number of Hypertext Transfer Protocol

Answer 77

TCP 80

Question 78

Port Number of POP3 (Post Office Protocol)

Answer 78

TCP 110

Question 79

Port Number of NTP (Network Time Protocol)

Answer 79

UDP 123

Question 80

Port Number of IMAP4 (Internet MEssage Access Protocol)

Answer 80

TCP 143

Question 81

Port Number of LDAP (Lightweight directory Access Protocol)

Answer 81

TCP 389

Question 82

Port Number of HTTPS (HTTP Secure)

Answer 82

TCP 443

Question 83

Port Number of rsh (Remote Shell)

Answer 83

TCP 514

Question 84

Port Number of RDP (Remote Desktop Protocol)

Answer 84

TCP 3389

Question 85

Protocol number of ICMP

Answer 85

1

Question 86

Protocol number of IP in IP (tunneling)

Answer 86

4

Question 87

Protocol number of TCP

Answer 87

6

Question 88

Protocol number of UDP

Answer 88

17

Question 89

Protocol number of EiGRP

Answer 89

88

Question 90

Protocol number of OSPF

Answer 90

89

Question 91

Protocol number of IPv6

Answer 91

41

Question 92

Protocol number of GRE

Answer 92

47

Question 93

Class A Address Range

Answer 93

1.0.0.0 -126.0.0.0

Question 94

Class A Private Address Range

Answer 94

10.0.0.0 - 10.255.255.255

Question 95

Class B Address Range

Answer 95

128.0.0.0 - 191.255.0.0

Question 96

Class B Private Address Range

Answer 96

172.16.0.0 - 172.31.255.255

Question 97

Class C Address Range

Answer 97

192.0.0.0 - 223.255.255.0

Question 98

Class C Private Address Range

Answer 98

192.168.0.0 - 192.168.255.255

Question 99

What is Regional Internet Registries?

Answer 99

RIR

Question 100

What is eui-64? How does it work?

Answer 100

Extended Unique Identifier Router automatically generates a unique ID by splitting the MAC Address into two halves "FFFE" is then placed between the two halves The seventh bit is then inverted (0 to 1 or 1 to 0) Put everything back together

Question 101

Well known port number range

Answer 101

0 - 1023

Question 102

Registered port number range

Answer 102

1024 - 49151

Question 103

Dynamic (Private) port number range

Answer 103

49152 - 65535

Question 104

What is an AD hoc wireless LAN?

Answer 104

An AD hoc wireless LAN connection is a wireless between two or more devices. Connection grows weaker the further away devices are.

Question 105

What is a SSID?

Answer 105

Service Set Identifier | name of wireless network

Question 106

What is a BSSID?

Answer 106

Basic Service Set Identifier | MAC address of single router or Access Point

Question 107

What is an ESSID?

Answer 107

Extended Service Set Identifier | Name given to a collection of BSSIDs making up a network (same as a SSID)

Question 108

Describe a Mesh wireless LAN?

Answer 108

There is no single AP, not everything connects to send packets

Question 109

Describe the infrastructure of an enterprise wireless LAN

Answer 109

Wireless Access Points connect to Wireless LAN Controller WLC.

Question 110

Describe what a Wireless LAN Controller is

Answer 110

Wireless LAN Controller (WLC) coordinates operations b/t APs. Allows movement of device connections to other APs. Self-healing

Question 111

What is Self-healing

Answer 111

Boost power/frequency of other APs to account for a downed AP. Can reduce power if causing interference.

Question 112

What is a Cisco DNA (Digital Network Architecture) Center?

Answer 112

An appliance that provides a graphical interference and a programming interface to Design your network, implement Policies, implement Provisions, Assurance, and Platform development management for enterprise

Question 113

Describe Cisco DNA Center Design

Answer 113

Implement site floor plans, device locations, etc.

Question 114

Describe Cisco DNA Center Policy

Answer 114

IP ACL, QoS, Bandwidth allowance

Question 115

Describe Cisco DNA Center Provision

Answer 115

By plugging in new devices, device can acquire IP address through DHCP. Once IP is given DNA gives boot config to newly connected devices. (Auto-boot config)

Question 116

Describe Cisco DNA Center Assurance

Answer 116

Troubleshooting, feedback on how to resolve issues, can trace paths through network. Network Time Travel (trace data stoppage at any point from the past)

Question 117

Describe Cisco DNA Center Platform

Answer 117

Development, APIs, use scripts to develop

Question 118

What is an ACI?

Answer 118

Application Centric Infrastructure, management for data center