Recent questions tagged computer-networks

A TCP connection uses $\mathbf{32-}$bit sequence numbers, which means there are $2^{32}$ (about $4.3$ billion) unique byte-counts.A network has a Maximum Packet Lifetime ...

CONSIDER THREE MACHINES, P, Q, AND R, WITH IP ADDRESSES $192.168.10.130$, $192.168.10.190$, AND $192.168.10.220$ RESPECTIVELY. THE SUBNET MASK IS SET TO $255.255.255.240$...

A SENDER USES THE STOP-AND-WAIT ARQ PROTOCOL.THE SIZE OF A DATA FRAME IS $\mathbf{2000}$ BYTES. THE SIZE OF AN ACKNOWLEDGEMENT IS $\mathbf{50}$ BYTES. THE ONE-WAY PROPAGA...

FOR A HOST MACHINE THAT USES THE TOKEN BUCKET ALGORITHM, TOKENS ARRIVE AT A RATE TO SUSTAIN A DATA RATE OF $20$ MEGABYTES PER SECOND. THE MAXIMUM OUTPUT RATE OF THE HOST ...

CONSIDER THE ENTRIES SHOWN BELOW IN THE FORWARDING TABLE OF AN IP ROUTER. EACH ENTRY CONSISTS OF AN IP PREFIX AND THE CORRESPONDING NEXT HOP ROUTER. THE NOTATION '/N' IN ...

Consider a network that uses Ethernet and IPv4. Assume that IPv4 headers do not use any options field.Each Ethernet frame can carry a maximum of $1600$ bytes in its data ...

Which of the following does not use key(s)?Symmetric CiphersGeneration of Message DigestGeneration of Message Authentication CodeKey exchange algorithms

Computer $\text{A}$ is assigned with IP address $10.0.0.126$ and computer $\text{B}$ is assigned with IP address $10.0 .0 .131$. Network mask is $255.255 .255 .192$ in bo...

While troubleshooting Internet access problem reported by a user, a computer technician finds that the default gateway setting is wrong. Which layer of OSI model is assoc...

\Which of the following can be protected using a firewall?Dumpster DivingPhysical TheftShoulder SurfingNetwork Scanning

What is the ideal TCP window size of a sender to fully utilize a link of bandwidth $8192000 \; \mathrm{bps}$ and latency of $32 \; \mathrm{ms}?$$65536$ bytes$8192$ bytes$...

Station A uses 512 bytes packets to transmit messages to Station B using a sliding window protocol. The round trip delay between A and B is 80 milliseconds and the bottle...

An IP address $172.20.85.100$ is part of a network with a $/26$ subnet mask. What is the fourth octet (in decimal) of the broadcast address for this specific network?

A TCP connection (using the Reno algorithm) has an initial congestion window ( cwnd ) of $1$ MSS and an initial slow start threshold ( ssthresh ) of $16$ MSS.The connecti...

Consider an instance of TCP's congestion control algorithm. The initial congestion window size ( cwnd ) is $1$ MSS and the initial slow start threshold ( ssthresh ) is $1...

Consider two nodes communicating using the Stop-and-Wait protocol. The data frame size is $1000$ bits. The channel has a transmission rate of $5000$ bps, and the one-way ...

A network segment using the CSMA/CD protocol operates at $100$ Mbps. The segment is $2$ km long, and the signal propagation speed in the cable is $2 \times 10^8 \mathrm{~...

Suppose computers $A$ and $B$ have IP addresses $192.168.10.5$ and $192.168.12.70$, respectively.Which of the following netmasks, if used by both computers, will place th...

Consider a Go-Back-N sliding window protocol that uses a frame size of 1000 bytes to send data on an $8$ Mbps link. The protocol uses $5$ bits for the sequence number fie...

An IP router using CIDR has the following entries in its routing table. A packet with the destination IP address $172.29.140.92$ arrives.\[\begin{array}{ll}\text{Prefix} ...

Consider a network that uses Ethernet and IPv4. Assume that the IPv4 headers do not use any options field. Each Ethernet frame can carry a maximum of $1000$ bytes in its ...

A CSMA/CD network is set up with a maximum cable length of $2.5$ km . The network bandwidth is $500$ Mbps, and the signal propagation speed in the cable is $200,000 \math...

The subnet mask for a particular network is $255.255.240.0$. Which of the following pairs of IP addresses could belong to this network?$172.16.5.5$ AND $172.17.5.5$ $130....

A link has a transmission speed of $2 \times 10^6$ bits/sec. It uses data packets of size 500 bytes each. Assume that the acknowledgment has negligible transmission delay...