Dưới đây là slide cơ bản về giao thức OSPF.
CCNA 1 – V4.0 – Test module – Chapter 05
(Phần màu đỏ là đáp án đúng)
- destination network address
- source network address
- source MAC address
- well known port destination address
2. What information is added during encapsulation at OSI Layer 3?
- source and destination MAC
- source and destination application protocol
- source and destination port number
- source and destination IP address
3. In a connectionless system, which of the following is correct?
- The destination is contacted before a packet is sent.
- The destination is not contacted before a packet is sent.
- The destination sends an acknowledgement to the source that indicates the packet was received.
- The destination sends an acknowledgement to the source that requests the next packet to be sent.
4. Which IP packet field will prevent endless loops
- header checksum
CCNA Lab Guide của tác giả Dương Văn Toán là một tài liệu Tiếng Việt đầy đủ cho những ai học CCNA hay thực hành với các thiết bị của Cisco. Tài liệu bao trùm hầu hết kiến thức cơ bản cũng như nâng cao để thực hành với thiết bị Cisco (router, switch,v.v..), có thể dùng để hướng dẫn thực hành hoặc tra cứu.
Nội dung: Continue reading “CCNA Lab Guide v4.0”
CCNA 1 – V4.0 – Test Module – Chapter 04
(Phần in đậm là đáp án đúng)
Based on the transport layer header shown in the diagram, which of the following statements describe the established session? (Choose two.)
- This is a UDP header.
- This contains a Telnet request.
- This contains a TFTP data transfer.
- The return packet from this remote host will have an Acknowledgement Number of 43693.
- This is a TCP header.
2. With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications?
- 0 to 255
- 256 to 1022
- 0 to 1023
- 1024 to 2047
- 49153 to 65535
- What application layer protocol is commonly used to support for file transfers between a client and a server?
- What are two forms of application layer software? (Choose two.)
- A network administrator is designing a network for a new branch office of twenty-five users. What are the advantages of using a client-server model? (Choose two.)
- centralized administration
- does not require specialized software
- security is easier to enforce
- lower cost implementation
- provides a single point of failure
- What is the purpose of resource records in DNS?
- temporarily holds resolved entries
- used by the server to resolve names
- sent by the client to the server during a query
- passes authentication information between the server and client Continue reading “CCNA 1 – V4.0 – Test module – Chapter 03”
CCNA 1 V4.0 – Test module – Chapter 2
(Màu đỏ là đáp án đúng)
Which statements correctly identify the role of intermediary devices in the network? (Choose three.)
determine pathways for data
initiate data communications
retime and retransmit data signals
originate the flow of data
manage data flows
final termination point for data flow
Select the statements that are correct concerning network protocols. (Choose three.)
define the structure of layer specific PDU’s
dictate how to accomplish layer functions
outline the functions necessary for communications between layers
limit the need for hardware compatibility
require layer dependent encapsulations
eliminate standardization among vendors