Examtut

Multiuser communication allows multiple point-to-point (peer) connections between multiple instances of Packet Tracer. By allowing communication between Packet Tracer instances, a new door has been opened to a fun, interactive, social, collaborative, and competitive learning environment. Instructors will now be able to create a variety of activities for students to learn in groups that will facilitate greater social interaction between students. Students will benefit from this environment by working together to solve problems and share ideas. Both students and teachers should take full advantage that Multiuser will offer in their learning environment. Technical Information Communicates between instances using PTMP. PTMP is TCP based. By default, uses TCP port 38000, is customizable, and each new instances on the same PC will use the next available port. On by default. UPnP will attempt to establish port forwarding to facilitate home networks. All network co...

Question 1 Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication? A. transport B. network C. presentation D. session E. application Answer : E Explanation: The application layer supports application and end-user processes. Communication partners are identified, quality of service is identified, user authentication and privacy are considered, and any constraints on data syntax are identified. Everything at this layer is application-specific. This layer provides application services for file transfers, e-mail, and other network software services. Telnet and FTP are applications that exist entirely in the application level. Question 2 A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about th...

Internet Protocol version 4 (IPv4) 32 bit address Example : 11000000 10101000 01100100 00000001 Divided into 4 groups So each group contains 8 bits. To separate groups we use PERIODS Example : 11000000 . 10101000 . 01100100 . 00000001 The format of IP address is dotted decimals We have to convert those binary bits in numbers (decimals). Example : 192 . 168 . 100 . 1 Starting number of each group must be 00000000 (0) Ending number of each group must be 11111111 (255). Classes of IP Address How to Find Class of an IP Address? Class Range Size Hosts A 1 – 126 Large 16,777,214 B 128 – 191 Medium 65,534 C 192 – 223 Small 254 D 224 – 239 Res...

Which of the following is a characteristic of full-duplex communication? A.  It is a CSMA/CD network. B.  It is a CSMA/CA network. C.  It is point-to-point only. D.  Hub communication is done via full duplex. Answer: C. It is point-to-point only. Explanation: The meaning of full duplex in computer network simply refers to a device can send and receive data without collision. Whereas Half duplex refers a device can either send or receive data. But it cannot do both at the same time. CSMA/CD (Carrier Sense Multiple Access with Collision Detection) a set of rules determining how network devices respond when two devices attempt to use a data channel simultaneously (called a collision). CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is a protocol for carrier transmission in 802.11 networks. Unlike CSMA/CD (Carrier Sense Multiple Access/Collision Detect) which deals wit...