Lab1

. The following is configured on a router             Router(config)# interface g0/0.10             Router(config-subif)# encapsulation dot1Q 20             Router(config-subif)# ip address 192.168.30.1 255.255.255.0 A packet is sent from the router out the subinterface to a trunk port on a switch. The switch will treat the packet as if it is on what VLAN? . The following is configured on a router             Router(config)# interface g0/0.10             Router(config-subif)# encapsulation dot1Q 20             Router(config-subif)# ip address 192.168.30.1 255.255.255.0 A packet is sent from the router out the subinterface to a trunk port on a switch. The switch will treat the packet as if it is on what VLAN? VLAN 20 VLAN 30 VLAN 10 The native VLAN

Subject: Computer Networks Note: Please answer in own words. copy from internet will very unhelpful for me. Question:  Explain the timing diagrams of two different connection establishment mechanisms of TCP.

R R R Q S (a) (b) (c) For each circuit above, discuss whether or not the circuit has really the same behaviour as the RS latch. Hint: use NOR gate for the RS latch and then do the analysis.

Q14: Multiple Choice - The function of ARP is to what? a. Translate from well known TCP ports to IP addresses. b. Translate between IP addresses and TCP Ports c. Translate from IP addresses to MAC addresses. d. Translate from MAC addresses to IP addresses. e. Address Routing Protocol - converts routes. f. None of the above.

(c) Write a VHDL code to implement the above counter using conditional statement "case". You need not necessarily use a synchronous load mechanism.

Q. No 3. In a Public Switch Telephone Network (PSTN), how the analog speech signal is converted to digital signal in the PCM? Also highlight the main functions of the given parts in the PSTN figure. Public Switched Trelephone Network PSTN W7CLOUD.COM Central Office

The following data are transmitted in a serial communication system (P is the parity bit). What parity is being used in each case? a. ABCDEFGHP = 010000101 b. ABCDEFGHP = 011000101 c. ABCDP = 01101 d. ABCDEP = 101011 e. ABCDEP = 111011

Q12: CSMA/CD is a protocol used in what Data Link Layer protocol? a. Polling b. Token Passing bus c. Token Passing ring d. Ethernet e. TDMA f. FDMA g. CDMA h. None of the above

Build a 2 bit up/down grey code counter.

The terminal count up (TCu) and terminal count down (TCd) of 74193 are normally ____ . The TCu is used to indicate that ____ count is reached.  HIGH, 9th B.LOW, 9th C. HIGH, 15th D. LOW, 15 E. LOW, maximumD. a BCD decade up/down counter E. a register

Explain how the data logger works in at least four points or sentences.

From the given circuit, derive the simplified NOR circuit and identify the TTL ICs in the design & its quantity. Don't forget to write the boolean expression which becomes the basis of the circuit construction

Assume the baud rate equals bits per second. How long is a bit for a 9600 baud modem? A) 9600 B) 104 us C) 1.04 ns D) 9.6 ns

2) Design a 4-bit up/down gray counter?

Q3 /mention (3) main differences between TCP/IP AND OSI MODEL?

can you drow a 5 bits johanson Counter ? with D filp flop.

b) Three stations share a 60 kbit/s ALOHA channel. The average bit rates transmitted from each of the three stations are 5 kbit/s, 8 kbit/s and 11 kbit/s. The length of each packet is 75 bits. i) Determine the normalized throughput of pure and slotted ALOHA. ii) Draw the general relationship between throughput and traffic for both pure and slotted ALOHA.

Exercise (3): A modem transmits using an 4-level signaling technique. If each signaling element has duration of 0.5ms. (a) Show the timing-diagram for a data stream 10111000111100010011 (b) Find the baud Rate and the bit Rate (c) How could you duplicate the transmission speed? Show the timing-diagram for a given data stream in (a). (d) How many bits per level are required if a modem using 7-level signalling mode? Exercise (4): A device is sending out data at the rate of 1000 bps. a. How long does it takes to send out 10 bits? b. How long does it take to sent out a single character (8bits)? c. How long does it take to send a file of 100,000 characters?

1- Which layers are network support layers? a. Physical Layer b. session Layer 2-What are the responsibilities of Data Link Layer? a. Framing b. Encryption c. Mail services 3- What are the types of errors? a. Compression b. Redundancy c. Single-Bit 4- What are the responsibilities of Application Layer? c. Application Layers Flow Control b. Translation c. Mail services 5- application layer protocols? a. TFTP b. ICMP c. (ARP)

Q6: Sectoring is a way to do what? a. Achieve branch circuits. b. Put each phone call in a different time slot. c. Do SS7 look-ahead call placement. d. Partition Voice mail boxes e. It is an ISDN-PRI way of brining in trunks f. Achieve frequency reuse. g. None of the above

The "bubbles" at the outputs of the 7442 decoder mean this IC has active _____ (HIGH, LOW) outputs.

Q32) The process of code conversion of the output Of PCM encoder into codes that are suitable for the transmission lines is called a. Line coding b. Mixing c. source coding d. Filtering     This multiple choice question from DIGITAL COMMUNICATIONS course.just write for me the final answer.

How many NAND gates are required for implementing the function DD C O a. None of the above O b. 6 Ос. 4 O d. 3

Question ACTIVITY : CODING Suppose the following messages are source encoded given by the table. Decode the set of directions given by the message received. Message Received Decoded Message 10010011 1.) 01010010 2.) 11000110 3.) 01100111 4.) 00101111 5.)