1.1 Compare And Contrast The OSI Model Layers And Encapsulation Concepts.

Question 1

A network administrator is reviewing some packets flagged by the instructions detection system (IDS). The administrator notice that the packets are ping packets, but the size of the packets is much larger than expected. What is the MOST likely cause of the oversized packets?

O Corrupted MTU
O False positive
O TCP flags
O Modified payload

Answer 1

Modified Payload

Question 2

An organization has asked a network administrator to research and submit a purchase order for a new network access points. The network administrator is attempting to choose between using wired and wireless access pints. Which layer of the OSI model is the administrator making a decision?

O Data link layer
O Physical layer
O Sessioin layer
O Network layer

Answer 2

Physical layer

Question 3

A network engineer is adding a bridge into the network design. Where in the Open Systems Interconnection (OSI) model will this bridge operate? (Select all that apply.)

O Layer 5 of the OSI model
O Transport layer of the OSI model
O Layer 2 of the OSI model
O Data Link layer of the OSI model

Answer 3

Layer 2 of the OSI model
Data Link layer of the OSI model

Question 4

A server contains two ethernet cards. Two departments on separate networks need access to the server resources on either side. A systems administrator configures a bridge with the interfaces. The administrator utilizes a bridge configuration to achieve which of the following?

O Connecting different networks as if they were one
O Connecting different network for communication purposes but keeping them separate
O Protecting differing networks from one another
O Connecting devices within a single network

Answer 4

Connecting different networks as if they were one

Question 5

Which Open Systems Interconnection (OSI) layer assumes responsibility for managing network connections between applications?

O Physical
O Session
O Data Link
O Network

Answer 5

Session

Question 6

Which of the following protocols reside at the application layer of the Open Systems Interconnection (OSI) model? (Select all that apply)

O SMTP
O TCP
O HTTP
O IP

Answer 6

SMTP
HTTP

Question 7

An engineer upgrades an organization’s network. Part of the upgrade focuses on the consolidation of devices. In particular, planning to replace routers and switches is on suitable replacement that performs the required functions?

O IDS/IPS
O Firewall
O Repeater
O Multilayer switch

Answer 7

Multiplayer switch

Question 8

Client A is sending data to Server A. The packet has left the application layer and traversed the ISO model through to the data link layer. Which header will get encapsulated onto the packet at the data link layer?

O UDP header
O Ethernet header
O TCP header
o IP header

Answer 8

Ethernet header

Question 9

Host A is communicating with Host B. Host A uses the American Standard Code for Information Interchange (ASCII) and Host B uses Unicode. The clients agree to translate the communication to ASCII. What later of the Open systems Interconnection (OSI) model does the agreement and translation occur?

O Application
O Presentation
O Transport
O Session

Answer 9

Presentation

Question 10

An engineer troubleshoots a network connectivity issue that the server team reported. The engineer notices that the trunk port is down between two routers. After checking the fiber link on the router, the engineer moves the cable and notices that the link light comes on. The issue is MOST likely a part of what layer of the OSI model?

O Session layer
O Data link layer
O Network layer
O Physical layer

Answer 10

Physical layer

Question 11

A network administrator is looking at an ARP table on a switch for connected devices. Which Open Systems Interconnection (OSI) layer are they looking at?

O Data Link
O Network
O Session
O Physical

Answer 11

Data Link

Question 12

Client A is sending data to a Server A. The packet has left the application layer and traversed the ISO model through to the data link layer. Which header will get encapsulated onto the packet at the data link layer?

O IP header
O TCP header
O UDP header
O Ethernet header

Answer 12

Ethernet header

Question 13

A network administrator is reviewing some packets flagged by the intrusion Detection System (IDS). The administrator notices that the packets are ping packets, but the size of the packets is much larger than expected. What is the MOST likely cause of the oversized packets?

O Corrupted MTU
O modified payload
O TCP flags
O False positive

Answer 13

Modified payload

Question 14

A network engineer is adding a bridge into the network design. Where in the Open Systems Interconnection (OSI) model will this bridge operate? (Select all that apply.)

O transport layer of the OSI model
O Data link layer of the OSI model
O Layer 2 of the OSI model
O Layer 5 of the OSI model

Answer 14

Data Link layer of the OSI model
Layer 2 of the OSI model

Question 15

A technician surveys an office space to document the network. Upon discovering a network closet, the technician finds a network bridge. After examining the possibilities, what description satisfies the technician’s notes regarding the bridge?

O Connecting devices within an single network
O Connecting different networks for communication purposes, but keeping them separate
O Protecting differing networks from one another
O Connecting different networks as if they were one

Answer 15

Connecting different networks as if they were one

Question 16

A junior-level systems administrator troubleshoots network connectivity. Results of the troubleshooting reveal a device that is new to the administrator. This device connects all hosts and routes network traffic. After evaluating the possibilities, and based on the device’s characteristics, what does the network utilized for connectivity and traffic flow?

O Firewall
O Multiplayer switch
O Repeater
O IDS/IPS

Answer 16

Multilayer switch