CCNA 1 – V4.0 – Test module – Chapter 05
(Phần màu đỏ là đáp án đúng)
1. In an IPv4 environment, what information is used by the router to forward data packets from one interface of a router to another?
- 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
- type-of-service
- identification
- flags
- time-to-live
- header checksum