Network Fundamentals

Question 1

Question 1:

Which seven steps are considered the generic troubleshooting process (in the right order)?

Explanation

Checkhttp://www.ciscopress.com/articles/article.asp?p=1578504&seqNum=2

Answer 1

Defining the problem, Gathering information, Analyzing the information, Eliminating possible problem causes, Creating a hypothesis, Testing that hypothesis, Solving the problem

Question 2

Question 2:

Which two protocols work at Layer 7 of the OSI Model. Choose two.

Explanation

DNS and NTP work at Layer 7. The OSI has 7 layers. Layer 7 is called the Application Layer and is designed to interact with software. Layer 7 protocols include: DNS, DHCP, HTTP, NTP, SMTP and more.GRE and ICMP are not Layer 7 protocols. GRE is used to create tunnels, ICMP is a controlling protocol. UDP is a Layer 4 protocol along with TCP

Answer 2

• DNS

- NTP

Question 3

Question 3:

Which layer is described here: ‘Creates logical paths to transmit data’

Explanation

Layer 3, the network layer, creates logical paths, provides routing, and transmits data. This layer can be identified by the following keywords: routers, IP, routing, logical paths, addressing.

Answer 3

L3

Question 4

Question 4:

Which protocol describes Ethernet?

Explanation

IEEE 802.3 is a group of standards for LAN (Ethernet). RFC 1918 describes private IP addresses, RFC 1518 describes CIDR. Finally, IEEE 802.11 is used for wireless standards. Memorize all these standards and check more online or in the CCENT book!

Answer 4

IEEE 802.3